JINGLING 4 inch 100mm Diamond Flat Lap Disc Coated Grinding Disk Grit 320 Medium

Outside diameter: 4" inch(100mm); Arbor hole: 5/8" (16mm); Thickness: 1.1mm; Grit: 320 Medium, Suitable to grinding gemstone, jewelry, carving knife, glass, rock, tile, etc, All diamond flat laps wheels have a 5/8" arbor hole, can be used in the angle grinder, Absolutely flat and parallel to meet the most exacting faceting requirements, Recommended for grinding on faceting material plus lapidary grinding when precision is required