[13 guitar sets] stainless steel saddle nut file, 0.4 / 0.5 / 0.6 / 0.7 / 0.75 / 0.8 / 0.9 / 1.0 / 1.05 / 1.1 / 1.2 / 1.4 / 1.6 / 25mm ground length and 30mm hook and loop, perfect The tool the rope slot into the nut and bridge to adjust the rope height. [32-blade Feeler standard] 32 hardened steel blades with a measuring range of 0.0015 inches (0.038 mm) to 0.035 inches (0.889 mm). This is a universal interval string measurement tool for guitars. The chrome-plated spindle is easy to clean and has a professional appearance. . [Sandpaper] Includes 9 sheets (3 x 400 grit, 3 x 320 grit, 3 x 240 grit) for polishing saddles, nuts, and strings. You can also use it to scrub boards, free wires, etc. [Application] Suitable for acoustic and electric guitar, bass, , ukulele . Application: Perfect tool for inserting chord grooves into nuts and bridges to adjust chord height. 32 Blade Feeler Specifications Material: 65 manganese steel with lubricating oil coating to prevent pouring and corrosion. Application: It is suitable for designers, engineers, and mechanics to measure thread clearance thickness, plug plugging clearance, clearance, ring clearance and other hard-to-reach . colour: silver + black Material: stainless steel size: sandpaper Size: 10 x 12.5 cm Package Contents: 1 * 32-in-1 feeler gauge 1 * 13-in-1 grinding file 9 * sandpapers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.