GC - 6pc 7" 180mm Diamond Flat File Set 40 to 600 Grit For Ceramics Tile GlassUS FASTPER The set of (6) embedded-diamond files with round dipped handles. The file portions are about 10mm wi Soft PVC-dipped handles have excellent grip even when exposed to moisture and fluids Size: 7" (180mm) x 10mm; Grit: 40, 80, 150, 240, 400, 600 Works on all natural materials marble, wood, stone, bone etc. Used in deburing, fixing chipped glass & tile,deling,many hobbies and professional applications