1500 VERY FINE GRIT HIGH QUALITY Abrasive Disc Wheel Diameter : 6 inches - Arbor Hole Size: 1/2 inch - Diamond Coating Density : High PRECISION Lapidary Grinding Glass - Stones - Rocks - Jewelry Making - Metal Tool Sharpening - Grinding Compatible with Worksharp Tool Sharpeners PROFESSIONAL Quality Electroplated High Density Diamond Coated Flat Lap Lapping Lapidary Glass - Jewelry Polishing - Tool Grinding Sharpening Metal Back Disc Horizontal Wheel Multiple Grit Versions Available from DRILAX - Choose the best that suits your application. Make a set.