Quality material: This guitar gauge set is made of stainless steel with rounded edges, rustproof and smooth to the touch, will not scratch or hurt your hands, suitable for long-term use. String action gauge ruler: The pocket-sized gauge ruler is marked with metric and imperial scales on two sides, allowing measurement of string height, bridge saddle height, saddle slot depth, pickup polepiece height, fret slot depth, and nut height. Versatile and widely used: This multi-tool set is designed for measuring, polishing, grinding, and adjusting various string instruments, ideal for both luthiers and beginners, ensuring accurate setup and tuning. Whether measuring fret and string height, pickups, fingerboard level, groove width, neck deformation, and more, this tool set provides comprehensive solutions. Suitable for musicians of all levels, this simple and precise set helps users achieve proper instrument setup without straining their fingers. Wide range of use: The feeler gauge set is suitable for measuring electric guitars, electric basses, and acoustic guitars, including fretboard radius measurement for proper string and action adjustment. Package includes: 1 x 9-piece T-Type ruler set, 1 x PVC string height ruler, 1 x 32-piece string distance ruler, 4 x radius gauges Color: Silver Material: Stainless steel and plastic Package contents: 1 x Guitar measuring tool set Note: The package includes only the items listed above; other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.