--- product_id: 120208648 title: "Set of 9 Understring Radius Gauge Luthier Tools and 32 Blades Feeler Gauge Dual Marked Metric & Imperial Gap Measuring Rulers Tool for Guitar and Bass Bridge Saddle Adjustments" brand: "onwon" price: "₩29386" currency: KRW in_stock: true reviews_count: 3 url: https://www.desertcart.kr/products/120208648-set-of-9-understring-radius-gauge-luthier-tools-and-32 store_origin: KR region: South Korea --- # 9 precision radius sizes 32 hardened steel blades Dual metric & imperial markings Set of 9 Understring Radius Gauge Luthier Tools and 32 Blades Feeler Gauge Dual Marked Metric & Imperial Gap Measuring Rulers Tool for Guitar and Bass Bridge Saddle Adjustments **Brand:** onwon **Price:** ₩29386 **Availability:** ✅ In Stock ## Summary > 🎸 Tune Like a Pro, Measure Like a Maestro! ## Quick Answers - **What is this?** Set of 9 Understring Radius Gauge Luthier Tools and 32 Blades Feeler Gauge Dual Marked Metric & Imperial Gap Measuring Rulers Tool for Guitar and Bass Bridge Saddle Adjustments by onwon - **How much does it cost?** ₩29386 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/120208648-set-of-9-understring-radius-gauge-luthier-tools-and-32) ## Best For - onwon enthusiasts ## Why This Product - Trusted onwon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ergonomic & Portable:** Foldable feeler gauge with thumb-notch blade protector for quick, easy blade access on the go. - • **Dual-Scale Convenience:** Metric and imperial etched markings for effortless, accurate readings—no guesswork. - • **Precision Radius Mastery:** 9 stainless steel gauges from 7.25" to 20" for flawless fretboard and saddle adjustments. - • **Versatile Instrument Care:** Perfect for electric, acoustic, and bass guitars—measure fret height, string gaps, neck deformation, and more. - • **Ultimate Thickness Control:** 32 hardened, corrosion-resistant blades ensure exact gap measurements every time. ## Overview This comprehensive set includes 9 stainless steel understring radius gauges covering the most popular fretboard radii and 32 hardened steel feeler gauge blades with dual metric and imperial markings. Designed for precision guitar and bass maintenance, it enables accurate measurement of fretboard radius, saddle height, string gaps, and neck condition, making it an essential tool for professional and enthusiast luthiers alike. ## Description Set of 9 Understring Radius Gauge Luthier Tools and 32 Blades Feeler Gauge Dual Marked Metric & Imperial Gap Measuring Rulers Tool for Guitar and Bass Bridge Saddle Adjustments ## Features - 9 Understring radius gauge: including 7.25", 9.5", 10", 12", 14", 15", 16", 17" and 20" radius, can be applied to accurately measure fret board radius, saddle radius nut radius from either the top or the bottom radius surface, made of stainless steel, a must have for bass guitar maintain and adjustment - 32 Blades feeler gauge: constructed from hardened tempered steel with a lube oil coating to prevent pitting and corrosion, each measuring feeler gauge has 32 blades thickness; Foldable feeler gauges, easy and convenient to take and store - Easy identification: dual marked metric and imperial, 0.0015 inch/ 0.04 mm to 0.035 inch/ 0.88 mm, the numbers of size are etched into feeler gauge for easy identification. The blade protector has a thumb notch to aid in removal of blades,designed for easy using. - These come in the most popular fingerboard radius and make it easy to measure the radius from either above or below the strings. Obtain accurate measurements of your instrument's fretboard radius using the bottom radius of the gauge. Then use the matching top radius of this gauge to determine the proper height adjustment for the bridge saddles. - Wide application: the guitar measure tool can be applied for measure the height of fret and strings，sound pick-up and strings, and the unevenness of the fret, level of fingerboard, width of pillow on the groove, deformation degree of the guitar neck. Can be applied to measure all kinds of electric guitar, electric bass, acoustic guitar, acoustic guitar, electric box guitar fretboard measured in radians, radians to adjust the strings piano code ## Product Details - **Brand:** Onwon - **Material:** Stainless Steel - **Range:** 0.04 mm - 0.88 mm, 0.0015 inch - 0.035 inch millimeters, inches - **Manufacturer:** Onwon ## Images ![Set of 9 Understring Radius Gauge Luthier Tools and 32 Blades Feeler Gauge Dual Marked Metric & Imperial Gap Measuring Rulers Tool for Guitar and Bass Bridge Saddle Adjustments - Image 1](https://m.media-amazon.com/images/I/61F++L5ac8L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Arch Gauges *by S***R on July 28, 2023* Worked great on my guitar neck. Many different degrees. ### ⭐ Not accurate *by I***N on February 17, 2022* The radius gauges are not accurate. Gauges 12 through 17 are identical. Brutal.Returning. ### ⭐ worst product ever *by A***W on October 24, 2021* hate it ## Frequently Bought Together - Onwon Set of 9 Understring Radius Gauge Luthier Tools and 32 Blades Feeler Gauge Dual Marked Metric & Imperial Gap Measuring Rulers Tool for Guitar and Bass Bridge Saddle Adjustments - iLuiz Guitar Neck Notched Straight Edge Luthiers Tool for Gibson Fender and Most of Guitar Fretboard and Frets - StewMac Fret End Dressing File - Professional Luthier Guitar Repair Tool - Fix Sharp Frets & Fret Sprout - For Rounding, Shaping, and Deburring - Works on All Frets! (1175) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/120208648-set-of-9-understring-radius-gauge-luthier-tools-and-32](https://www.desertcart.kr/products/120208648-set-of-9-understring-radius-gauge-luthier-tools-and-32) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-05-15*