Holmer Guitar Luthier Tools with 15 Blades Feeler Gauge Metric, String Action Gauge Ruler, Fingerboard Fretboard Radius Gauge Measuring Tool, 2 Fingerboard Guard Protectors.

15 Blades feeler gauge set is made of 65 manganese steel, great for gap spacing measurement from 0.002 inch (0.051mm) to 0.025 inch (0.635 mm) with dual marked metric and imperial - inches and millimeters, foldable is 3.7 inches / 9.5cm in length easy and convenient to take and store. Fingerboard guard protect your guitar or bass fretboard frets from scratching or damaging while filing and polishing. Durable stainless steel string action ruler with precision etched markings so prints will not easily wear off from continued use; accurate and clear to measure string height, bridge height, nut slot depth, bridge slot depth and pickup height. High quality guitar radius gauge fingerboard fretboard measuring tool and radius gauges in7.25'' 9.5'' 10'' 12'' 14'' 15'' 16'' 20'' radiu. Make the necessary measurements and adjustments on acoustic and electric guitar, bass, banjo, mandolin and other string instruments, accurate, convenient, pocket-sized measuring tool can be taken to everywhere you like.