The Best String Action Ruler of 2021 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best String Action Ruler of 2021. Check our ranking below.

2,210 Reviews Scanned

Rank No. #1
SIREN String Action Gauge Mark II – Guitar Setup Ruler – Luthier Tool (Thousandths of an Inch String Height Scale)
  • THOUSANDTHS OF AN INCH STRING HEIGHT SCALE: For those who prefer to setup their string height in Thousandths of an Inch. This scale is located along the bottom edge of the Gauge and is represented by white bars running from left to right. Starting from 0.01 inches and ending on 0.14 inches in ten thousandths (0.01) of an inch increments.
  • MULTIPLE APPLICATIONS: Scales in both Inches and Millimeters can be used for a wide range of applications, including measuring String Height, Pickup Height, Bridge Height and Bridge Saddle Slot Depth on a variety of stringed instruments including Guitar, Bass, Ukulele, Banjo and Mandolin. Equipped with a convenient Conversion Chart printed on the rear side of the Gauge. Providing Fraction (Inches) to Decimal (Inches) to Metric (Millimeters) conversions.
  • NO SHARP EDGES OR POINTED CORNERS: Features an innovative design with rounded corners, 0.60mm thickness and smooth polished edges, to ensure your instrument will be safe from scratches and damage when performing repairs and setups.
  • PREMIUM QUALITY CONSTRUCTION: Made from high quality stainless steel for maximum strength and durability. Scales and charts are laser engraved ensuring all measurements are highly accurate and will not wear off with use. Allowing you to enjoy the product for years to come.
  • ENHANCED VISIBILITY: White scales engraved on the matte black Gauge provide an excellent contrast to the instruments strings. This contrast makes the measurements highly visible, ensuring impeccable setups every time.
Rank No. #2
String Action Ruler Gauge,Guitar Repairing Tool for Luthier,Fit for Guitar,Ukulele,Bass,Banjo,Mandolin
  • Military quality, Laser etched, Precise and clear calibration.Made of high strength stainless steel, durable.
  • The 12th fret string-distance has engraved on and clearly to read, which provides you with a set of standard data. They include: electric guitar, acoustic guitar and bass, Two units comparing groups are visible including inches and millimeter.
  • Suitable for guitar, bass, ukulele, banjo, mandolin and other stringed instruments.
  • Multifunctional measuring tools,string-distance,bridge saddle height and depth,fret groove depth.string-distance of electric guitar pickup.It's the direction guide for your guitar repairing.A tool must have for every serious player.
  • pocket-size body, you can take it anywhere. Say goodbye to your heavy caliper.
SaleRank No. #3
Forever-Direct String Action Gauge Ruler, Guitar Set Up Tool Kit for Electric Bass and Acoustic Guitar
  • Made of stainless steel which is stable,durable,beautiful and widely used
  • With scale for string height, for ridge saddle slot depth and for nuts saddles and pole pieces
  • With conversion chart of string action at 12th fret printed on one side
  • Fit for electric guitar, Bass , acoustic guitar,mandolin,banjo,etc
  • Convenient ,pocket-sized ruler which can take to everywhere you like
Rank No. #4
String Action Ruler Gauge Tool for Electric Bass and Acoustic Guitar
  • Useful conversions, long lasting etched printing
  • Pocket-sized, a lot of info on a tool of this size
  • With conversion chart of string action at 12th fret printed on one side
  • With scale to measure string height, bridge saddle height, saddle slot depth, pickup polepiece height, fret slot depth and nut height
  • Perfect accurate action measurements for string instruments such as guitar, bass, mandolin, banjo, etc
Rank No. #5
Simtyso Guitar String Action Ruler Gauge Tool Measuring Kit for Electric Bass and Acoustic Guitar
  • Suitable for string instruments such as guitar, bass, mandolin, banjo, etc Pocket-sized with multi use on both side. Imperial (inches) One Side, Metric (millimetres) On The Other. With Conversion Chart of String Action at 12th Fret Printed.
  • Each gauge is printed with a useful decimal and metric conversion chart. It's easy to read so checking and adjusting string action will definitely be a breeze.
  • Perfect accurate action measurements for string instruments such as guitar, bass, mandolin, banjo, etc
  • Made of stainless steel, accurate, durable nice outlook
  • Ruler size:51mm×90mm×5.8mm
Rank No. #6
MusicNomad Precision Action Gauge Ruler for String Height-Metric, SAE, 64ths (MN602)
  • Accurate Measurements that are Easy to Read with our Innovative Black Finish Contrasted with Deep Etched White Markings
  • We Include Measurements in Inches, Metric & 64ths to Customize to Your Preference
  • Our Convenient Chart on Proper Height by Instrument Type & Measurement Instructions Takes out the Guesswork. The Pickup Ruler Helps you Dial in Your Sound Even More. Bonus Feature: Find the Side that Lays Across 3 Frets and use as a Fret Rocker to Check if You have any Uneven Fret Heights
  • High Quality Stainless Steel Design with Smooth Edges Combined with Numbers & Lines that don’t Rub Off Ensures Years of Use
  • This Gauge is Part of our KEEP IT SIMPLE, SETUP (KISS) Method using our Precision Gauges & Tool Sets
Rank No. #7
FretGuru String Action Gauge Guitar Ruler Precision 8-in-1 Fret Rocker Luthier Tool Guitarist Gift #Bonus Leather CASE# Precise CNC Machined, Diamond Honed, Polished Edge = NO Scratched FRETS
  • Precise string action gauge in .010" (ten thousandths of an inch) number increments, and .005" line increments = super accurate guitar setup! The markings are NOT printed - they are actually laser etched through the black surface, deeply into the stainless metal. No printing to rub off! Also check out the new, precision 64ths string action gauge. The accuracy of the FretGuru 2 will bring your guitar out of the realm of woodworking and into another world of playability.
  • Unique, first of it's kind fret height/fret wear gauge in .005" increments. No more fumbling with calipers, straightedges or feeler gauges.
  • Fret rocker! The 3 unequal length sides are CNC machined, precision diamond honed and polished. Now you can find that pesky high fret without scratching your frets.
  • Another first - the uniquely designed Nut Slot Height gauge, which has already been a massive time-saver here on the workbench.
    You’ll notice the silver square on the bottom corner of the gauge. This corner is designed and engineered to be just under .010” thick, which allows it to slip into each nut slot - including the narrow high e slot.
  • Simply rest the thin corner into the bottom of each nut slot - and the other end across to the 2nd fret, then measure the gap as the gauge passes over the 1st fret. It's never been easier to zero in on the perfect string height as it leaves the nut.

    Also, be sure to check out the separate listing for the sweet handmade custom leather case! Double click on the photos for the expanded view.

Rank No. #8
BIGTEDDY - String Action Ruler Gauge Measuring Tool for Electric Acoustic Guitar Bass Mandolin Banjo
  • Suitable for string instruments such as guitar, bass, mandolin, banjo, etc
  • Pocket-sized with multi use on both side. Imperial (inches) One Side, Metric (millimetres) On The Other. With Conversion Chart of String Action at 12th Fret Printed.
  • Use To Measure: Nut / String / Bridge / Pickup Pole Piece / Saddle Height Plus Saddle Slot/ Fret Slot Depths
  • Perfect accurate action measurements for string instruments such as guitar, bass, mandolin, banjo, etc.
  • Made of stainless steel, accurate, durable nice outlook
Rank No. #9
TIMESETL 2Pack Stainless Steel Feeler Gauge Dual Marked Metric and Imperial Gap Measuring Tool 32 Blades + String Action Ruler Gauge Tool for Guitar Player & Luthier & Mechanic Auto Repair
  • 【High Quality】Stainless steel with rounded off edge, anti rust, prevent scratch or cutting, durable and long service life.Surface polished smooth, applying anti-rust oil to prevent rust.
  • 【Imperial and Metric】1Pcs foldable feeler gauge + 1pcs guitar string action ruler, both imperial and metric printed, packed in plastic holder, easy to use
  • 【Feeler Gauge】Balde legnth 8.8cm/width 1.3cm, thickness from 0.035"(0.88mm) to 0.0015"(0.04mm), light oil covered to prevent rust and stick, thumb screw is easy to use for blade removal and protection
  • 【Action Ruler】Size 8.9*5.1cm, etch printing on double sides, will not fade, accurate and clear to measure string height, pickup height, etc
  • 【Wide Application】 They measure accurately and have almost no errors, will help you quickly and easily measure gap width/thickness. Suitable for designers, engineers, mechanics to measure the tappet clearances, spark plugs gaps, bearing clearances, piston ring gaps, guitars gaps, engines gaps, everything in between and other hard to reach places.
SaleRank No. #10
TIMESETL 26 Pcs Guitar Repairing Tool Kit with Wire Plier, String Organizer, Fingerboard Protector, Hex Wrenches, Files, String Action Ruler, Spanner Wrench, Bridge Pins for Guitar Ukulele Bass Mandol
  • Including everything for string changes and set-ups, perfect for maintaining and keeping your instrument in perfect playing condition. Change strings, set intonation, adjust action, check string height and more. Suitable for: electric guitar, bass, mandolin, banjo, ukule, acoustic guitar and so on.
  • Guitar files are in various shape, equaling flat, round, half round. String Action Ruler Gauge Tool could be uesd on both side. It's easy to read, so checking and adjusting string action will definitely be a breeze.
  • Screwdriver: you can adjust screwdriver's length and exchange its head by pressing the Round Iron Piece in the middle of the screwdriver. String Organizer makes changing strings quick and easy.
  • Guitar fingerboard guards for protecting your guitar or bass fretboard from scratching or damaging while filing and polishing. Guitar wire plier is suitable for cutting soft alloy/copper/iron wires, guitar strings, cable ties, pins of electronic component.
  • Muti Spanner Wrench will tighten or loosen most nuts or thumb wheels found on guitars, like output jack, control pot, pickup switch, tuning machine and bridge thumbwheels.

Last update on 2021-08-28 / Affiliate links / Images from Amazon Product Advertising API

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We provide an String Action Ruler 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 String Action Ruler currently available on the market.

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  1. Brand Value: Every brand of String Action Ruler 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 String Action Ruler?
  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 String Action Ruler.
  5. Customer Ratings: Number ratings grade String Action Ruler objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their String Action Ruler.
  7. Product Quality: You don’t always get what you pay for with an String Action Ruler, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an String Action Ruler is should be an indication of how long it will work out for you.

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