DT-DIATOOL Diamond Beveling Chamfer Bit 2PCS 20mm with Hex Shank for Tile Porcelain Ceramic Granite Marble Existing Holes Enlarging Polishing Shaping Trimming Repairing

Diameter 4/5 Inch(20mm): workable length 46mm; Chamfer angle: top angle 56 degree; Grit:#80. With the Hex shank, used on hand drill. General hand drill RPM is from 2000-5000RPM. The higher speed you use, the longer life of the product. Not for directly drilling holes,but designed to enlarge, shape, polish, clean, trim, finish, round or bevel existing rough holes of marble ceramic porcelain tiles granite, etc. Diamond grit #80, helps to reduce the risk of tile cracking when under tension; Wet or dry use. Vacuum brazing technology keeps premium diamonds more firmly and durable. Better work effect and longer life. As a small and delicate tool,just one this versatile milling bit/diamond cones beveling bit,many holes of can be created from 0-4/5 Inch. Or make round chamfer on the edge.