4″ inch Diamond Coated Flat Lap Disk Grinding Wheel Grit 80 CoarseProduct Specification: Product Name: 4 inch Diamond Grinding Disc, Diamond Coated Grinding Disk, Flat Lap DiskOutside diameter: 4″ inch (100mm)Arbor hole: 5/8″ (16mm)Thickness:1.1 mmGrit: 80 CoarseDiamond coating Density: Perfectly highDiamond coating surface area : almost 90%, only one side is coated diamondTotal Quantity: 1 PieceWet use recommendedSuitable to grinding gemstone, jewelry, glass, rock, 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. 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 and are intended to be using on Angle Grinder. Also Available in Grits 60, 80, 100, 120, 150, 180, 240, 320, 400, 500, 600, 800,1000, 1200, 1500, 1800, 2000, 3000 We will send out your order within 1-2 days after payment has been received and cleared. Please let us know if you are looking for other accessories or hardware.