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HomeRadius Gauges

10 Best Radius Gauges Of 2026

Radius Gauges — Reviews, Recommendations & Updated Buying Guide May 2026

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🏆Our Top Pick
WANGCL 9PCS Under string Radius Gauge and String Action Gauge Ruler for Adjustments Guitar and Bass Setup Bridge Saddle
01
9.9
Exceptional
(1,648 reviews)
🔥 4 interested

WANGCL 9PCS Under string Radius Gauge and String Action Gauge Ruler for Adjustments Guitar and Bass Setup Bridge Saddle

WANGCL
DISCOUNTED TODAY

Why We Love It

The best all-in-one guitar setup solution with 9 radius gauges
Precision string action measurements prevent costly fretwork mistakes
Professional luthier quality without breaking the bank
9.9
Exceptional
(1,648 reviews)
🔥 4 interested
Available at AmazonShow Offer
Walfront 4pcs Stainless Steel Fillet Gauge
02
9.6
Exceptional
(4,683 reviews)

Walfront 4pcs Stainless Steel Fillet Gauge

Walfront
DISCOUNTED TODAY

Why We Love It

Exceptional 4-piece stainless steel set covers R0.3-25mm range
Premium industrial-grade construction outlasts amateur alternatives
Multi-range capability eliminates buying separate gauge sets
9.6
Exceptional
(4,683 reviews)
Available at AmazonShow Offer
Radius Gauge Set 32 Plates R7-14.5mm Metric Radius Fillet Gauge
03
9.3
Excellent
(1,002 reviews)

Radius Gauge Set 32 Plates R7-14.5mm Metric Radius Fillet Gauge

Radius
DISCOUNTED TODAY

Why We Love It

Excellent 32-plate design handles R7-14.5mm metric measurements
Lightweight portable tool fits any toolkit or workbench
Precise fillet gauge readings prevent assembly defects
9.3
Excellent
(1,002 reviews)
Available at AmazonShow Offer
Swpeet 2 Sets Guitar Luthier Tools Set with Understring Radius Gauge and 32 Blade Feeler Gauge
04
9.1
Excellent
(4,239 reviews)

Swpeet 2 Sets Guitar Luthier Tools Set with Understring Radius Gauge and 32 Blade Feeler Gauge

Swpeet
DISCOUNTED TODAY

Why We Love It

Smart budget pick combines understring radius gauge and 32 blades
Guitar luthier tools set covers metric and imperial dual marks
Complete measurement toolkit for bass and acoustic setups
9.1
Excellent
(4,239 reviews)
Available at AmazonShow Offer
Guitar String Action Gauge Ruler Set
05
8.9
Very Good
(1,720 reviews)

Guitar String Action Gauge Ruler Set

Guitar
DISCOUNTED TODAY

Why We Love It

Strong performer combining 9 radius gauges plus action ruler
Complete measurement toolkit for both guitar and bass
Professional repair-quality results from one compact set
8.9
Very Good
(1,720 reviews)
Available at AmazonShow Offer
WANGCL 9Pcs Guitar Understring Radius Gauge with Pin Puller Set Luthier Setup Tools for Guitar Bass Fretboard Measurements and Bridge Saddles Adjustments
06
8.7
Very Good
(5,419 reviews)

WANGCL 9Pcs Guitar Understring Radius Gauge with Pin Puller Set Luthier Setup Tools for Guitar Bass Fretboard Measurements and Bridge Saddles Adjustments

WANGCL
DISCOUNTED TODAY

Why We Love It

Solid choice with included pin puller for luthier work
9-piece understring radius system masters fretboard geometry
Bridge saddle adjustments become faster and more accurate
8.7
Very Good
(5,419 reviews)
Available at AmazonShow Offer
WANGCL 2PCS Guitar Fingerboard Fretboard Saddle Nut Radius Gauges Measuring Tool
07
8.5
Very Good
(1,362 reviews)

WANGCL 2PCS Guitar Fingerboard Fretboard Saddle Nut Radius Gauges Measuring Tool

WANGCL
DISCOUNTED TODAY

Why We Love It

Reliable 2-piece gauge pair specializes in fingerboard precision
Saddle and nut measurements achieve perfect setup balance
Compact design keeps workspace uncluttered
8.5
Very Good
(1,362 reviews)
Available at AmazonShow Offer
WANGCL Guitar Repairing Tools Kit
08
8.4
Good
(765 reviews)

WANGCL Guitar Repairing Tools Kit

WANGCL
DISCOUNTED TODAY

Why We Love It

Smart entry-level solution with 25-piece complete repair kit
All-in-one toolkit eliminates multiple tool purchases
Includes fret rocker and leveling set for comprehensive setup
8.4
Good
(765 reviews)
Available at AmazonShow Offer
Thread Gauge Measure Tool Radius Gauge Set External Internal Gauge Stainless Steel Convex Concave Gauge Radius Fillet Gauge for Die Makers(R1-6.5MM)
09
8.2
Good
(1,304 reviews)

Thread Gauge Measure Tool Radius Gauge Set External Internal Gauge Stainless Steel Convex Concave Gauge Radius Fillet Gauge for Die Makers(R1-6.5MM)

Thread
DISCOUNTED TODAY

Why We Love It

Great starter kit featuring convex and concave gauges
R1-6.5mm stainless steel set handles diverse applications
Die maker quality suitable for precision industrial work
8.2
Good
(1,304 reviews)
Available at AmazonShow Offer
MusicNomad Precision Fretboard and String Radius Gauge Tool
10
8
Good
(2,585 reviews)

MusicNomad Precision Fretboard and String Radius Gauge Tool

MusicNomad
DISCOUNTED TODAY

Why We Love It

MusicNomad precision engineering delivers professional results
2-piece fretboard and string radius system ensures perfect action
Trusted brand reputation backing every measurement
8
Good
(2,585 reviews)
Available at AmazonShow Offer

Quick Pick

10 Best Radius Gauges Of 2026

Quick Pick

#1
WANGCL 9PCS Under string Radius Gauge and String Action Gauge Ruler for Adjustments Guitar and Bass Setup Bridge Saddle

WANGCL 9PCS Under string Radius Gauge and String Action Gauge Ruler for Adjustments Guitar and Bass Setup Bridge Saddle

View Details
#2
Walfront 4pcs Stainless Steel Fillet Gauge, Radius Fillet Gauge, Radius Gauge, Measuring Tool, R0.3-1.5/ R1-6.5/ R7-14.5/ R15-25

Walfront 4pcs Stainless Steel Fillet Gauge, Radius Fillet Gauge, Radius Gauge, Measuring Tool, R0.3-1.5/ R1-6.5/ R7-14.5/ R15-25

View Details
#3
Radius Gauge Set 32 Plates R7-14.5mm Metric Radius Fillet Gauge, Portable Measuring Tool

Radius Gauge Set 32 Plates R7-14.5mm Metric Radius Fillet Gauge, Portable Measuring Tool

View Details
#4
Swpeet 2 Sets Guitar Luthier Tools Set with Understring Radius Gauge and 32 Blade Feeler Gauge, Guitar Gauge Measurement Tool, Steel Dual Marked Metric and Imperial Gap Feeler Gauges for Guitar Bass

Swpeet 2 Sets Guitar Luthier Tools Set with Understring Radius Gauge and 32 Blade Feeler Gauge, Guitar Gauge Measurement Tool, Steel Dual Marked Metric and Imperial Gap Feeler Gauges for Guitar Bass

View Details
#5
Guitar String Action Gauge Ruler Set, 9 Guitar Radius Gauge and 1 String Action Gauge Ruler Measuring Tool for Guitar and Bass Setup Repair Tools

Guitar String Action Gauge Ruler Set, 9 Guitar Radius Gauge and 1 String Action Gauge Ruler Measuring Tool for Guitar and Bass Setup Repair Tools

View Details
#6
WANGCL 9Pcs Guitar Understring Radius Gauge with Pin Puller Set Luthier Setup Tools for Guitar Bass Fretboard Measurements and Bridge Saddles Adjustments

WANGCL 9Pcs Guitar Understring Radius Gauge with Pin Puller Set Luthier Setup Tools for Guitar Bass Fretboard Measurements and Bridge Saddles Adjustments

View Details
#7
WANGCL 2PCS Guitar Fingerboard Fretboard Saddle Nut Radius Gauges Measuring Tool

WANGCL 2PCS Guitar Fingerboard Fretboard Saddle Nut Radius Gauges Measuring Tool

View Details
#8
WANGCL Guitar Repairing Tools Kit, 25Pcs Setup Including String Ruler Gauge Measuring Tool Hex Wrench Files Fingerboard Guard Understring Radius Gauges Fret Rocker Leveling Set

WANGCL Guitar Repairing Tools Kit, 25Pcs Setup Including String Ruler Gauge Measuring Tool Hex Wrench Files Fingerboard Guard Understring Radius Gauges Fret Rocker Leveling Set

View Details
#9
Thread Gauge Measure Tool Radius Gauge Set External Internal Gauge Stainless Steel Convex Concave Gauge Radius Fillet Gauge for Die Makers(R1-6.5MM), #-02

Thread Gauge Measure Tool Radius Gauge Set External Internal Gauge Stainless Steel Convex Concave Gauge Radius Fillet Gauge for Die Makers(R1-6.5MM), #-02

View Details
#10
MusicNomad Precision Fretboard and String Radius Gauge Tool - 2 pc. Set (MN603)

MusicNomad Precision Fretboard and String Radius Gauge Tool - 2 pc. Set (MN603)

View Details

Buying Guide: Radius Gauges

📋 Table of Contents

  1. 1.What's the difference between concave and convex radius gauges?
  2. 2.How do I know which radius gauge set size to buy?
  3. 3.What should I check to make sure a radius gauge is accurate?
  4. 4.Is it worth buying a premium stainless steel radius gauge set instead of standard steel?
  5. 5.Do I need separate gauges for metric and imperial measurements?

1What's the difference between concave and convex radius gauges?

Concave gauges measure inner curves and radii (like the inside of a pipe bend), while convex gauges measure outer curves and radii (like rounded edges on metal stock). You'll need both types if you work with different surfaces, or you can get a combined set that has both sides on each blade.

2How do I know which radius gauge set size to buy?

Look at the common radii you work with — most sets range from 1mm to 15mm, which covers general metalworking, machining, and finishing tasks. If you need larger or smaller radii regularly, check the individual range on the set before buying to ensure it matches your typical work.

3What should I check to make sure a radius gauge is accurate?

Run your finger along each blade's edge — it should feel smooth and consistent with no burrs or flat spots that affect contact. The numbers should be clearly stamped or laser-marked so you can easily identify each radius, especially in workshop lighting.

4Is it worth buying a premium stainless steel radius gauge set instead of standard steel?

Stainless steel gauges resist rust and corrosion better, which matters if you're working in humid environments or with wet materials — standard steel needs regular care. For dry shop conditions, standard steel is fine and more affordable, though stainless lasts longer with less maintenance.

5Do I need separate gauges for metric and imperial measurements?

Most professional sets include both metric (mm) and imperial (inches) measurements on the same gauges, so one set covers both systems. Check the product details to confirm it's a dual-reading set before buying, since some cheaper options only show one measurement type.

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