This diamond polishing disc is made of premium metal with one side diamond coated, almost 95%. Features high hardness, wear resistance, and excellent impact resistance, well electroplating diamond particles provides long service life This diamond grinding disc is designed for cutting or sanding stones and glass. 100% new and high quality. Extremely flat and parallel design makes the disc fully Seamless fit, the embedded abrasive allows fast cutting while achieve the most exactly faceting requirements. grinding wheel Grit: 600# 800# 1500# 3000# Material: diamond colour: silvery Package Contents: 4 x Diamond Polishing Disc Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.