--- product_id: 30908020 title: "StewMac Understring Radius Gauges, Set of 9, Standard Width for Guitar Setup, for 6-String Guitars and Most 4-String Basses" brand: "stewmac" price: "€ 67.09" currency: EUR in_stock: true reviews_count: 10 category: "Stew Mac" url: https://www.desertcart.ie/products/30908020-stewmac-understring-radius-gauges-set-of-9-standard-width-guitar store_origin: IE region: Ireland --- # Fits 6-string guitars & 4-string basses 9 precise radius options Low profile for under-string use StewMac Understring Radius Gauges, Set of 9, Standard Width for Guitar Setup, for 6-String Guitars and Most 4-String Basses **Brand:** stewmac **Price:** € 67.09 **Availability:** ✅ In Stock ## Summary > 🎯 Nail your setup like a pro—because your guitar deserves precision. ## Quick Answers - **What is this?** StewMac Understring Radius Gauges, Set of 9, Standard Width for Guitar Setup, for 6-String Guitars and Most 4-String Basses by stewmac - **How much does it cost?** € 67.09 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/30908020-stewmac-understring-radius-gauges-set-of-9-standard-width-guitar) ## Best For - stewmac enthusiasts ## Why This Product - Trusted stewmac brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Experts:** Top-rated by luthiers and guitar techs who know that quality tools mean flawless setups every time. - • **Perfect Fit for Pros:** Standard width fits string spreads up to 2-5/8", ideal for 6-string guitars and most 4-string basses—engineered for precision setups. - • **Built for the Long Haul:** Crafted with premium materials and backed by StewMac’s Lifetime Promise, this set is your forever tool. - • **Precision in Every Curve:** 9 radius gauges from 7-1/4" to 20" cover all common guitar and bass setups with unmatched accuracy. - • **Seamless Under-String Access:** Low-profile design lets you measure and adjust saddles without removing strings—save time and maintain your flow. ## Overview The StewMac Understring Radius Gauges set includes 9 meticulously crafted gauges ranging from 7-1/4" to 20" radius, designed for standard-width 6-string guitars and most 4-string basses. Its low-profile design allows for accurate saddle and polepiece height adjustments without string removal. Built with durability in mind and backed by a lifetime warranty, this toolset is a must-have for professional guitar technicians and serious musicians seeking flawless fretboard radius matching. ## Description Buy StewMac Understring Radius Gauges, Set of 9, Standard Width for Guitar Setup, for 6-String Guitars and Most 4-String Basses: Tools - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Quality tools! - We all know these tools from StewMac are expensive, but it's for good reason. These are all you'll need for radius gauges. They are accurate on top and bottom side. Easy to use. Review: Worth the extra money over the cheapies. - These are a bit pricey but, trust me, you get what you pay for with luthier tools. Believe me, I've learned the hard way on a few things over the years. It's the same with this product. You can find gauges for $10.00 a set. Don't fall for it. They'll either be inaccurate, have sharp edges, won't fit under the strings, or all of the above. Just fork over the extra $20 or $30 and be done with it. Buy once, cry once. You'll be glad you did. ## Features - COMPLETE SET FOR GUITAR TECHS: Radii include 7-1/4", 9-1/2", 10", 12", 14", 15", 16", 17", 20" for all setups - STANDARD SET of 9: Fits string spreads up to 2-5/8" ideal for 6-string guitars and 4-string basses - ACCURATE STRING HEIGHT MATCHING: Use top curvature to align saddle or polepiece height to fingerboard arc - LOW PROFILE FOR STRING-ON USE: Read fretboard radius and set saddles without removing strings - BUILT TO LAST A LIFETIME: All StewMac tools are backed by our Lifetime Promise for lifelong durability and our expert tech support is there when you need it most ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01HUCLDZ6 | | Best Sellers Rank | #3,884 in Musical Instruments ( See Top 100 in Musical Instruments ) #87 in Guitar Tools | | Brand Name | StewMac | | Color | Silver | | Customer Reviews | 4.8 4.8 out of 5 stars (144) | | Guitar Pickup Configuration | Magnetic | | Included Components | Set of 9 radius gauges | | Instrument | guitar | | Instrument Size | Standard Width, Set of 9 | | Manufacturer | StewMac | | Manufacturer Part Number | 0353 | | Model Name | Understring Radius Gauge Tool, Set of 9, Standard Width for Guitar Setup | | Model Number | 0353 | | Number of Strings | 6 | | Set Name | Standard Width, Set of 9 | | UPC | 840014709724 | | Unit Count | 1.00 Count | ## Product Details - **Brand:** StewMac - **Color:** Silver - **Guitar Pickup Configuration:** Magnetic - **Manufacturer:** StewMac - **Number of Strings:** 6 - **Set Name:** Standard Width, Set of 9 - **UPC:** 840014709724 ## Images ![StewMac Understring Radius Gauges, Set of 9, Standard Width for Guitar Setup, for 6-String Guitars and Most 4-String Basses - Image 1](https://m.media-amazon.com/images/I/61hKgGiJsoL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Quality tools! *by C***A on October 4, 2024* We all know these tools from StewMac are expensive, but it's for good reason. These are all you'll need for radius gauges. They are accurate on top and bottom side. Easy to use. ### ⭐⭐⭐⭐⭐ Worth the extra money over the cheapies. *by D***L on May 31, 2025* These are a bit pricey but, trust me, you get what you pay for with luthier tools. Believe me, I've learned the hard way on a few things over the years. It's the same with this product. You can find gauges for $10.00 a set. Don't fall for it. They'll either be inaccurate, have sharp edges, won't fit under the strings, or all of the above. Just fork over the extra $20 or $30 and be done with it. Buy once, cry once. You'll be glad you did. ### ⭐⭐⭐⭐⭐ Awesome *by A***R on March 7, 2024* It is stewmac so you know it is made with precision and good quality. A must have tool if you have fixed or hardtail bridges. And because I bought it through Amazon did not have to pay the high stewmac shipping cost. With much faster shipping through Amazon as well. ## Frequently Bought Together - StewMac Understring Radius Gauge Tool, Set of 9, Standard Width for Guitar Setup - StewMac String Action Gauge And Ruler, Metric, Stainless Steel - Designed by StewMac, The Original measuring tool for acoustic and electric guitar, and bass setup - StewMac Fret Rocker - The Original Stainless Steel 4-in-1 Mini Straightedge Luthier Tool, Precision-Machined for Accuracy, Locate High Frets Fast --- ## 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.ie/products/30908020-stewmac-understring-radius-gauges-set-of-9-standard-width-guitar](https://www.desertcart.ie/products/30908020-stewmac-understring-radius-gauges-set-of-9-standard-width-guitar) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-04-23*