{"product_id":"understring-radius-gauges-set-of-9-precise-guitar-setup-tools","title":"Understring Radius Gauges Set of 9 - Precise Guitar Setup Tools","description":"\u003cp\u003eIn this review the StewMac Understring Radius Gauges set is judged as a practical, pro-level tool kit for anyone who does regular guitar or bass setup work. The bottom line: this set of nine slim-profile gauges makes matching saddle and pickup heights to fretboard curvature straightforward and accurate, so the biggest reason to buy is predictable, repeatable setup results without removing strings. It suits techs and serious hobbyists who value reliable measurements from a tool backed by a lifetime promise.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete range:\u003c\/strong\u003e The set includes 7-1\/4in through 20in radii so a single kit covers common acoustic, electric and bass fretboard arcs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard width:\u003c\/strong\u003e Each gauge fits string spreads up to 2-5\/8in, which is ideal for most 6-string guitars and typical 4-string basses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-surface accuracy:\u003c\/strong\u003e Matching top and bottom arcs let you read the fretboard radius on the bottom and set saddle or polepiece heights on the top for consistent curvature alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow profile for on-string use:\u003c\/strong\u003e The slim design slides under strings so you can measure and adjust without detaching strings, saving time and preserving setup alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e Built for long service and backed by a lifetime promise, these gauges are meant to be a workshop staple.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe set is aimed at professional luthiers, repair shop technicians and dedicated home builders who need precise, repeatable tools for setup tasks. Anyone who frequently adjusts saddles, bridges or pickup polepieces will benefit from the ability to match string height to the board arc quickly.\u003c\/p\u003e\u003cp\u003eLess technical owners who only perform occasional basic adjustments might find a single-radius tool or a cheaper single-piece gauge adequate; this full nine-piece set is most cost-effective for people who work on multiple instrument types or require the full range of radii.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWell-made and accurate, letting techs perform precise saddle and polepiece alignment.\u003c\/li\u003e\n\u003cli\u003eLow-profile design allows measurements and adjustments without removing strings, speeding setup work.\u003c\/li\u003e\n\u003cli\u003eThe nine-radius range covers common guitar and bass radii so one kit handles most instruments.\u003c\/li\u003e\n\u003cli\u003eBacked by a lifetime promise for long-term durability and support.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eThe standard-width set fits string spreads up to 2-5\/8in, so it may not suit extended-range or wide-spread instruments.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded radii\u003c\/td\u003e\n\u003ctd\u003e7-1\/4in, 9-1\/2in, 10in, 12in, 14in, 15in, 16in, 17in, 20in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSet size\u003c\/td\u003e\n\u003ctd\u003e9 gauges\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003eStandard fit to 2-5\/8in string spread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary use\u003c\/td\u003e\n\u003ctd\u003eUnderstring radius measurement and saddle\/polepiece height setting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eLow-profile, dual-surface arcs for on-string use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLifetime Promise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe StewMac Understring Radius Gauges set is a smart buy for anyone who performs regular setups on 6-string guitars and most 4-string basses. It delivers accurate, repeatable measurements thanks to matching top and bottom arcs and a slim profile that works under strings, making it good value for workshops and serious hobbyists who need reliable results.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan I use these gauges without removing strings?\u003c\/strong\u003e\u003cbr\u003eYes, the low-profile design lets you slide the gauges under strings to read fretboard radius and set saddles or polepieces without detaching strings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the standard set fit my bass?\u003c\/strong\u003e\u003cbr\u003eThe standard width fits string spreads up to 2-5\/8in, which covers most 4-string basses; wider-stringed basses may require an extra-wide gauge set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these durable workshop tools?\u003c\/strong\u003e\u003cbr\u003eYes, they are built for long-term use and come with a lifetime promise and expert tech support for service questions.\u003c\/p\u003e","brand":"StewMac","offers":[{"title":"Default Title","offer_id":48255892095195,"sku":"B01HUCLDZ6","price":49.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61hKgGiJsoL._AC_SL1500.jpg?v=1778266260","url":"https:\/\/gearmusthave.com\/products\/understring-radius-gauges-set-of-9-precise-guitar-setup-tools","provider":"GearMustHave","version":"1.0","type":"link"}