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20 Best Universal Screwdriver Head of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best Universal Screwdriver Head of 2023. Check our ranking below.

2,122 Reviews Scanned

Rank No. #1
Fruholt Multi-function 7mm-19mm Ratchet Universal Sockets Metric Wrench Power Drill Adapter Set and 105 Degree Right Angle Extension Power Screwdriver Drill Attachment 1/4" Drive 6mm Hex Magnetic Bit
  • Screwdriver Fits : Fits standard 1/4- to 3/4-inch and metric 7-19mm nuts and bolt heads. 1/4" 6.35MM Hex Drill Bit Screwdriver.UNIQUE: Unique design automatically adjusts to any size or shape, compact and easy to carry.UNIVERSAL: A universal socket can be adjusted immediately to grasp the hex nut, screw eye, hook, tension screw and bolt head. Works on a power drill (adapter not included).
  • MULTILATERAL:Stainless steel construction with 54 individual hardened steel spring pins that retract to the shape of most objects.PROFESSIONAL: Professional grade universal socket wrench 7mm to 19mm, self adjusting universal repair tools.Can be used in automotive industry, household maintenance, manufacturing industry, construction.
  • 105°Angle Extension 1/4inch 6mm Hex Drill Bit Screwdriver Socket Holder Adaptor, 1/4 inch hex drive shaft is quick change compatible and fits most power drill, rechargeable drill, manual wrench and driver chucks,Magnetic 1/4 inch hex socket accepts and holds standard drill and driver bits.
  • The gears are mounted in a die cast with 3 durable ball bearings. Strong bulid-in magnetic socket holds standard hex drilling and drive bits, avoid falling.105° designs for tight spaces, extends the power of a cordless screwdriver, max torque: 10n/m.105 degree right angle head, designs for tight spaces, extends the power of a cordless screwdriver.Extends power of cordless screwdrivers-100 in/lbs. torque, 400 RPM.
  • 105 degrees angle extension, in which you use when you have hard places to get to,360 degree adjustable thumb flange.It can connect hand drill and manual wrench.The function head is equipped with a locking and magnetic device, to ensure that the sleeve does not fall.Built-in strong magnet for good holding power, accepts all 1/4" standard hexagon shank bits.Apply to all electric drill and socket wrench, which allows to reach unreachable or tight spaces.
Rank No. #2
Aramox 3pcs Short Screwdriver Cross Flat Head Screwdrivers Mini Slotted Screwdriver Universal for Repairing Maintenance
  • High-quality materials: The short screwdriver is made of high-quality steel, rust-proof, high hardness, wear-resistant, strong and durable
  • 100% brand new: 100% brand new, produced in strict accordance with standard quality, can directly replace old or damaged short screwdrivers
  • Non-slip handle: Knurled screwdriver is easier to hold, and the non-slip handle provides comfort and firm grip, and you will not feel tired after long-term use
  • Portable: compact size design, three types of screwdrivers are included to meet your different needs, can be easily stuffed into the bag, occupy a small space, easy to operate and carry.
  • Scope of application: knurled screwdriver is used for daily machine repair or maintenance
Rank No. #3
Flexible Drill Bit Extension, Includes 105° Right Angle Drill, Bendable, 3pcs 1/4 3/8 1/2" Universal Socket Adapter Set, 3pcs Drill Bit Holder, Screwdriver Bit Kit
  • 【Complete Collocation】Package included 1pcs bendable drill bit extension, 1pcs 105° right angle drill extension, 3pcs 1/4 3/8 1/2" universal socket adapter set, 3pcs Drill Bit Holders, 10pcs screwdriver bit set. These extension kit work great, when you have limited access.
  • 【1/4" 105° Right Angle Drill Attachment】105° Angle 1/4 inch Hex Drill Bit Screwdriver Socket Holder Adaptor,which is quick change compatible and fits most power drill, rechargeable drill, manual wrench and driver chucks.
  • 【Impact Driver Bit Set】1/4 Hex Shank Socket Adapter Impact Set Square Nut Driver Drill Bit 1/4" 3/8" 1/2" ,connect to the standard hex nut drivers, impact hole saws, spade bits and more.
  • 【Drill Bit Holders】1/4 Inch Hex Shank Magnetic Extension Chuck Adapter Quick Release Bar Socket Screwdriver Bit Holder | 60mm/ 100mm/ 150mm Length,Suitable for electric, pneumatic screwdrivers and other screwdriver bits of power tools, drill extended.
  • 【Flexible Shaft Drill Bit Extension】Length: 29cm/11.42" (Approx.); Hex Shank: 6.35mm (1/4"); Inner Hexagon Head: 6.35mm (1/4"); Features: for Electronic Drill, Connecting Link, Flexible.
Rank No. #4
Home DIY tools Universal Socket Wrench 7-19mm Multi-Function Hand Tool Universal Repair Kit - with 1.9" Electric Drill Adapter, Hex Soft Screwdriver Telescopic Flexible Shaft, Screwdriver heads
  • Universal Socket Grip 7mm to 19mm. Fits standard 1/4 to 3/4 inch and metric 7-19mm nuts and bolt heads and 1 Electric drill connecting shaft Freely rotating shaft inside, with 10-pc screwdriver heads of different sizes to meet most needs
  • Made of high-quality steel, durable and anti-rust. this universal sleeve is made of steel and features 54 Chromoly steel pins and an Electric drill connecting shaft. Helps You Out from Occasions When You Need the Power but Stuck at Full Angles
  • Enable you to work with universal socket tool deal with various shapes nuts, screws, hooks, lag screws, and bolt heads, etc.
  • Universal socket wrench electric drill connecting shaft and screwdriver heads of different sizes. can be used in the automotive industry, household maintenance, manufacturing industry, construction. loosen all screws, nuts, hooks, and other fasteners.
  • Universal socket grip adapter comes with a 1.9" power drill adapter. you can tighten screws by the hand when the electric drill the drivers is not near you.
Rank No. #5
Short Stubby Screwdriver, 3x Short Screwdriver Set Cross Flat Head Screwdrivers Universal for Repairing Maintenance
  • 【Superior Performance】Three types of screwdrivers are included to meet your different needs, different color for easy recognization. Flat and stubby screwdriver set, the stubby handle lets you get right at the problem. Handy for machine work.
  • 【Premium Materials】Short screwdriver is made of premium steel material, antirust, wearproof, sturdy and long-lasting. Sophisticated production, provides excellent quality, very high work efficiency.
  • 【Easy to Carry】Small size design makes them can be tucked into bags easily and occupy little space, easy to operate and carry. Light weight, can be carried with you, or placed in the trunk of the tool kit.
  • 【Easy to Use】Knurled screwdrivers are easier for you to grip, more convenient for repairing or maintenance, but we recommend professional installation.
  • 【No-risk Purchase】Our main goal is make your purchase happily and you are satisfied with our products. If you don't like our product or get the defective item. Please let us know, we will solve it as soon as possible. Just try it!
Rank No. #6
Aramox 3pcs Short Screwdriver Cross Flat Head Screwdrivers Universal for Repairing Maintenance Mini Sewing Machine Screwdriver
  • Purchase Reference: The short screwdriver with 3 different types, three types of screwdrivers are included to meet your different needs, and the different colors are easy to identify. Universal.
  • Function: The short screwdriver knurled screwdriver is easier to hold and easier to repair or maintain. The flat and stubby screwdriver set and the stubby handle allow you to solve the problem correctly. Suitable for machine operation.
  • Product Material: The short screwdriver is made of high-quality steel material and has the characteristics of long-lasting and durable performance. It has undergone fine surface treatment to ensure reliable performance and long service life. Our short screwdriver is more reliable and safer, and is your ideal choice.
  • Easy to Install and Use: It is very easy to install, you can easily complete the installation without complicated tools, and it is easy to use, saving you time and effort.
  • Strict Factory Inspection: Every product that arrives in your hands undergoes strict factory inspection to ensure quality.
Rank No. #7
Universal SD-TORQUE Implant Hex Driver Screw Screwdriver 16 Pcs Screw Drivers Head with All Major Implant Systems
  • Universal Implant Hex Driver Screw Screwdriver SD-TORQUE 16 Pcs Screw Drivers Head With All Major Implant Systems
  • Similar with Surgident SD-TORQUE With 16Pcs drivers Kit
Rank No. #8
SHARDEN Precision Screwdriver Set 56 in 1 Magnetic Driver Kit Professional Electronics Repair Tool Kit with Portable Bag for iPhone, Smartphone, iPad, PC, Computer, Laptop, Tablet, Game Console, Watch
  • Wide Application: SHARDEN professional electronics repair tool kit can be easily repaired almost any product in your life, such as repairing Xbox One Xbox 360 Controller, PS3 PS4 Controller, Nintendo switch lite, computer, laptop, iPhone, smart phones, tablet, New 3ds XL, joy-con, Gameboy Color, Game cube, virtual boy and other electronic devices. With the help of computer tool kit, your precision repairs would be smooth and efficient
  • Universal & Portable: SHARDEN 56 in 1 precision screwdriver kit magnetic comes with all the necessary tools which includes 40 precision bits, Extension Shaft, Suction Cup, ESD Angled Tweezer, Magnetizer, Plastic Spudgers and Opening Tools. All the tools are well organized with a portable leather bag, offering not only a whole protection but also easier storage and carrying
  • Various CR-V Bits: Our computer repair tool kit are carefully selected 40 high strength CR-V magnetic screwdriver bits to meet all your need. Torx(T6, T8, T10), Phillips(PH000,PH00,PH0), Flathead, Triwing, Pozidrive, Star, Triangle, Square, Slotted, which covers almost all kinds of required bit type in precision works. All of standard size bit undergo the rigorous quality control testing, the tip is stable and not easily stripped
  • Humanistic Design Handle: The laptop repair tool kit handle is ergonomic with a streamline design to fit comfortably in your hand, even for a long time use. The anti-slip area and the 360-degree rotatable tail allows for a greater torque and precise turning. The strong magnetic keeps the bits stable during working, which makes your repair experience worry-free
  • Customer First & Quality first: SHARDEN guarantee a long time use due to our excellent workmanship, compared with others, our product will be strictly inspected before shipment. If you have any issues with the quality or usage, please don't hesitate to contact us through Amazon, we will do our best to help every customer to solve any problem
Rank No. #9
Gummy Bear - Ghostbusters
  • Amazon Prime Video (Video on Demand)
  • --- (Director) - Gummybear International Inc. (Producer)
  • English (Playback Language)
  • English (Subtitle)
Rank No. #10
Schwinn Deluxe Bicycle Mounted Child Carrier/Bike Seat For Children, Toddlers, and Kids, Adjustable 3-Point Harness and Headrest, Padded Crossbar, Grey
  • Rack is compatible with seat post diameters from 25 to 32mm, designed to be mounted on the frame that can be easily installed on most adult bicycles using a Phillips screwdriver and adjustable wrench
  • Accommodating a single child, recommended for children age 1 year and up and weight limit up to 40 lbs.
  • Quick release 3 point harness, leg restraints, and padded cross bar offer added safety, while the adjustable footwells and removable headrest provide custom fit as your little rider grows
  • Vented to prevent wind drag, custom comfort padding that supports their back and the air cushioned pad that lines the seat
  • Enjoy safe, family-bonding bicycle rides with this deluxe child seat made with lightweight, polypropylene construction
SaleRank No. #11
Amazon Basics Flat Weight Workout Exercise Bench, Black
  • Flat weight bench for beginning and advanced workout routines
  • Durable steel tube frame and a smooth PVC padded top surface for strength and comfort
  • Assembles quickly and easily; upside-down T-shaped legs/feet provide reliable stability
  • Accommodates a wide range of fitness routines for a full-body workout in a small amount of space
  • Overall Dimensions: 41.5 x 18.2 x 18.1 inches ( LxWxH ); Top: 41.5 x 11 inches (LxW)
SaleRank No. #12
Himalayan Mood Lamp: Made with Real Salt! (RP Minis)
  • Scrimizzi, Marlo (Author)
  • English (Publication Language)
  • 32 Pages - 10/02/2018 (Publication Date) - RP Minis (Publisher)
Rank No. #13
Triwing Screwdriver for NS Switch, Repair Tool Kit for NS Joy-Con, Switch Lite, Battery Replacement and other DIY work on Game Console Controller
  • 🎮 Basic Precision Screwdriver Set Tool Kit For NS Switch repair work, Triwing Screwdriver for NS Switch and Joy-con Controllers, Security Game Bit Set Repair Tool Kit with Spudger Opening Pry tools Kit
  • 🎮 NS Switch Screw driver with Magnetic Tips Phillips Head PH00 Triwing Y00
  • 🎮 Safe Opening Pry Toolkit include Universal Stick Spudger kit, Green Opening Picks, ESD / Anti static tweezers, Mental Pry bar
  • 🎮 Fix your NS Switch and Switch Lite Screen, Replace Battery, and Parts Replacement with This Toolkit, perfect For DIY Replacement Projects
  • 🎮 Material: Screwdriver Aluminium alloy Steel, premium quality for long time use, Non-slip handle perfect for your work on Nintendo Switch Devices
Rank No. #14
10Pcs 2.5 Inch(65mm) Length Magnetic 6.0mm PH2 Phillips Slotted Double End Screwdriver Bits
  • Type of head: Slotted PH2 Phillips, Type of shank: 6.5mm/ 1/4-inch; Hex Shank, Overall length: 65mm/ 2.5inch
  • Hard steel, good workmanship, high precision.Easy to Use: Strong magnetic Hex Shank can suck the screws easily when used it.
  • Excellent Material: Made with high grade S2 steel material for a long lasting existence,each edge can be accurately locked screws, no damage to the screw, and the screwdriver head.
  • Wide Using Application: Can be used with electric screwdriver, manual screwdriver, electric drill, group general tools, ect.
  • If the product size is not suitable or quality problems, please contact us, we will help you solve the problem as soon as possible, thank you!
Rank No. #15
AZUNO 24 IN 1 Ratchet Screwdriver Set with Universal Socket, 20 CRV Bits Stored in Handle, 12+8 Slotted/Philips/Torx/Hex/Square Sand Blasted Bits and Chrome Plated Precision bits.
  • 【Multi Bits and Universal Socket】12 regular CRV bits and 8 chrome plated precision bits, stable performance. The universal Socket is suitable for loosen or tighten most bolts, nuts, hooks and other special-shaped fasteners that do not have suitable tools.
  • 【Three Ratcheting Settings】This ratcheting screwdriver set comes with 3 ratcheting switching modes, which can be adjusted by ratcheting settings to achieve clockwise, counterclockwise ratcheting and locking positions. It is more labor-saving and convenient than ordinary screwdrivers.
  • 【Clever Design】The ergonomic non-slip handle is designed for comfortable press and rotation; The drill bit is easy to store in the handle and easy to carry, so you don't have to worry about losing the drill bit.
  • 【Flexible Use】 The universal socket can instantly adjust to any size or shape, suitable for various shape and size objects. You can adjust the length of the 4.9-inch bit holder extension to meet your different needs.
  • 【Wide Application】This screwdriver sets including 20 pc screwdrivers bit-slotted; philips; torx; square; extension rods; 4mm adapter for precision bits; multi bit ratchet screwdriver.
Rank No. #16
2 Pack Pivoting Bit Holder Magnetic Pivot Drill Bit Holder Quick Release Flexible Screwdriver Bit Holder for Tight Spaces or Corners
  • The head pivots up to 20 degrees for use in corners or tight locations
  • Can be used in straight or pivot mode by adjust the locking collar
  • Pivoting bit tip holder features a 1/4 inch hex shank allows for use in any chuck or electric drills
  • Built-in strong magnet, can be quickly connected to the 1/4 inch hexagon shank bit and socket
  • Chrome vanadium steel forging, high hardness and high torque, surface plating, not easy to rust
Rank No. #17
Amartisan 24-piece Screwdriver Bit Set | Magnetic Slotted Phillips driver bit set | S2 Steel, long 1" and 2.3" Head Drill Bits Set
  • S2 Material Forging:The drill bit is made of high quality S2 alloy steel ,with sturdy hardened & tempered construction.
  • 12 Pack 1 Inch: Phillips 2-piece * PH1, 4-piece * PH2, 2-piece * PH3 and Slotted SL3(3mm), SL4(4mm), SL5(5mm), SL6(6mm).
  • 12 Pack 2.3 Inch: Phillips 2-piece * PH1, 4-piece * PH2, 2-piece * PH3 and Slotted SL3(3mm), SL4(4mm), SL5(5mm), SL6(6mm).
  • Wide Range of Uses: Used in automobiles, repairs, trucks, automobiles, engines, motorcycles, interiors, dashboards, computers, cable boxes, toys, appliances and consumer electronics, drill bits can also be used in many other protected parts.
  • General tools: The 1/4" hex handle can be used with electric screwdrivers, hand screwdrivers, electric drills, combination general purpose tools and any standard drill.
SaleRank No. #18
SHARDEN Multi Screwdriver 13-in-1 Screw Driver Adjustable Screwdriver Set Multitool All in One with Torx Security, Flat Head, Phillips, Hex, Square and 1/4 Nut Driver
  • 【Tool Saver】SHARDEN versatile 13 in 1 multi screwdriver includes a 1/4 inch nut driver and 12 common used screwdriver bits: T15/T20 Security Torx, 4mm/5mm/6mm Flathead, PH1/PH2/PH3 Philips, H4/H5 Hex, and SQ1/SQ2 Square. All the bits needed in one screw driver, reduce the number of tools you must carry
  • 【Adjustable Design】This screw driver set Includes a 4.53" extension shaft which is made from alloy steel, great for working in hard-to-reach areas. Press the adjust ring and extend the length for easier access. The impact rated blade can be removed and attached to power tool, gives you more possibility
  • 【Space Saver】Screwdriver multitool stores 12 changeable tips in the handle with an integrated bit holder. It's convenient to screw off the end cap and switch the bits. The screwdriver handle is 5.90" length, takes up very little space, fits into pocket, also suit for EDC, kitchen drawer, tool belt, tool box or backpack
  • 【Humanized Design】Our screw driversets set has been professionally designed to maximize your repair capabilities. Cushion grip bi-material handle provides superb comfort, slip resistant and maximum torque. Magnetic bit holder ensures speedy and secure bit changes while the 1/4 bit holder applies to standard 1/4" bits
  • 【Durability & Reliability】All bits are quality constructed with CRV Steel for longevity and durability. This multi-bit screwdriver set is covered by SHARDEN's lifetime warranty and 30 days money-back. If you have any issues, please don't hesitate to contact us, we will do our best to help every customer
SaleRank No. #19
Amartisan 18-in-1 Multi-bit Screwdriver Set Tool All in One, Portable Multi-Purpose Screwdriver, Slotted/Philips/Pozi/Torx/Square,Nut Driver
  • [High-end Handle Design]: Multi position screwdriver has ergonomic handle, anti-skid grip to reduce hand fatigue.
  • [High-Quality]: Industrial strength heat treated bits, Phillips Bit:PH0 PH1 PH2, Pozidriv Bit:PZ1 PZ2, Torx bit:T10 T15 T20 T25, Square Bit:S1 S2, Slotted Bit:5/32" 3/16" 1/4", Nut Driver:1/4” 5/16”, Core removal and schrader valve insertion bit.
  • [Clever Design]: The drill bit is easy to store in the handle and easy to carry, so you don't have to worry about losing the drill bit.
  • [Easy to carry]: Interchangeable blade for fast and easy switch out, suitable for home, car repair, outdoor and other working places, without additional screwdriver, a set of 18 in 1 screwdriver to solve all your problems.
  • [Exquisite Gift]: Suitable for professionals and amateurs, it is an ideal holiday gift for friends, family, customers and colleagues.
Rank No. #20
Ratcheting Screwdriver, KER Multi-tool Nut Screw Driver 10 in 1 Magnetic Head, S2 Steel, Industrial Strength , Ratchet Professional Adjustable Repair Tool
  • What’s Included: 1 PC Screwdriver Handle with 10PC S2 steel bits, stored in handle for easy access and portability; Phillips head (PH0, PH1, PH2, PH3), Flat head(SL3.0,SL5.0,SL6.0), Torx head (T8H), Tri-Point head (Y1), Spanner head (U4).
  • Prime Ratchet: helps you handle bidirectional screw tasks effortlessly, with a torque of 30N.m, 1.5x of international standard. (Forward/Reverse/Lock position adjustable)
  • Ergonomic Design: crafted for a comfort and anti-slip grip; Concealed bit storage adds to its beautiful finish and edc.
  • Multi-Angle: 180-degree adjustable bit holder to address challenging angles during repairs.
  • Ergonomic Design: crafted for a comfort and anti-slip grip; Concealed bit storage adds to its beautiful finish and edc.

Last update on 2023-08-01 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Universal Screwdriver Head?

Do you get stressed out thinking about shopping for a great Universal Screwdriver Head? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Universal Screwdriver Head, which is why we have assembled a comprehensive list of the greatest Universal Screwdriver Head available in the current market. We’ve also come up with a list of questions that you probably have yourself.

Romance University has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Universal Screwdriver Head that you consider buying. Your questions might include the following:

  • Is it worth buying an Universal Screwdriver Head?
  • What benefits are there with buying an Universal Screwdriver Head?
  • What factors deserve consideration when shopping for an effective Universal Screwdriver Head?
  • Why is it crucial to invest in any Universal Screwdriver Head, much less the best one?
  • Which Universal Screwdriver Head are good in the current market?
  • Where can you find information like this about Universal Screwdriver Head?

We’re convinced that you likely have far more questions than just these regarding Universal Screwdriver Head, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Universal Screwdriver Head, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Universal Screwdriver Head. Make sure that you are only using trustworthy and credible websites and sources.

Romance University provides an Universal Screwdriver Head buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Universal Screwdriver Head currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Universal Screwdriver Head has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Universal Screwdriver Head?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Universal Screwdriver Head.
  5. Customer Ratings: Number ratings grade Universal Screwdriver Head objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Universal Screwdriver Head.
  7. Product Quality: You don’t always get what you pay for with an Universal Screwdriver Head, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Universal Screwdriver Head is should be an indication of how long it will work out for you.

Romance University always remembers that maintaining Universal Screwdriver Head information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Universal Screwdriver Head is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

FAQ:

Q: What are the three parts of a screwdriver?

A: Screwdrivers have three basic parts: the handle, shaft and head. Screwdrivers are usually categorized by the type of head they have. Here are some common ones: If you only own one screwdriver, this is the one you want. Phillips head screws are as close to a universal screw as you can get in the U.S.

Q: What’s the size of a Phillips head screwdriver?

A: Phillips head screwdrivers range in size from 0000 to size 4. Again, it’s important to match the size of the screwdriver to the size of the screw you’re working with.

Q: Which is the best multi bit screwdriver on the market?

A: Best Multi-bit Screwdriver Wiha 77791 26-in-1 Ultra Driver For a tool we’ve known about since 2017, the Wiha 77791 26-in-1 Ultra Driver still manages to impress us. This best-in-class multi-bit screwdriver features an ultra-compact design that jams 26 tips into its small frame.

Q: What kind of screwdriver has a flat blade?

A: In terms of screwdriver technology, flat head screwdrivers are the most basic model. The Spruce says they date back to at least the 1500s. The blade is shaped like a chisel and (as you could probably guess) is flat. They fit into slotted screws, which have an indented line running through the diameter of the head.

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