Product Dimensions 3″L x 3″W. Compatible Devices Angle Grinder. DIAMOND FLOOR GRINDING PADS INCLUDES GRITS: 1Piece X 30#, 50#, 70#, 100#, 200#, 400#. APPLICATION: Metal bond coarse diamond polishing pad are designed to remove coatings on concrete floor to prepare the floor for polishing. SPECIAL: High diamond concentration for long life and aggressive material removal. Use dry or wet to smooth concrete or field stone. SPECIFICATION: Diameter 3″/80mm, segment length 0.3″/8mm. The height of diamond segment is higher than other general metal bond discs in the market, higher segments would make the disc not easy to wear out. PREMIUM QUALITY: Diamond segment is hot-pressd and professionally welded on the plate to make sure the density of segment is reasonable and help to extend the lifetime of the disc.