Material: diamond and resin Diameter: 3”/76 mm Workable Thickness: 15.4mm Grits: #50, #100 ,#200, #400, #800, #1500, #3000 Work Type: wet use FEATURE * Made of high quality diamond powder, strong and sharp grinding force * 15.4mm working thickness, more durable and long service life * Does not change in the color of the stone itself, with glazing fast, good brightness and not fade * Suitable for grinding polishing renovating concrete floor