Check the listing for details. 4" in Diamond Grinding Discs Grit 80-3000 Flat Lap Disks Tools for Angle Grinder. Color: Silver, Condition: New. Listed at 10.99 USD. JINGLING 4" inch Diamond Grinding Disc Wheel Coated Flat Lap Disk Grit 80-3000 Outside diameter : 4" inch (100mm) Arbor hole : 5/8" (16mm) Thickness : 1-1.1 mm Grit : 80 120 150 180 240 320 400 500 600 800 1000 1200 1500 2000 3000 Quantity: only 1 Piece, please choose the grit from the multiple-choice menu Grit type: Coarse/ Medium/ Fine/ Very Fine Diamond coating Density : Perfectly high Diamond coating surface area : almost 95%, only one side is coated diamond Wet use recommended Suitable to grinding gemstone, jewelry, glass, rock, carving knife, etc. These diamond discs are one of the finest discs manufactured for Hobby, Lapidary, Glass applications The diameter flat lap wheels have a high density quality diamond coating. They are absolutely flat and parallel to meet the most exacting faceting requirements. Use the fine grit diamond lap pad to smooth and shape pieces and create polished flat surfaces When used as part of a multi-stage grinding and polishing process it's easy to create smooth finished edges with a professional look. Quick Tips 1. Recommended for rough and fine grinding on faceting material plus general lapidary grinding when precision is required. 2. All our flat laps wheels have a 5/8" arbor hole, can be used in the Angle of grinding machine. Also Available in Grits 60, 80, 100, 120, 150, 180, 240, 320, 400, 500, 600, 800,1000, 1200, 1500, 1800, 2000, 3000. Please let us know if you are looking for other accessories or hardware.