DT-DIATOOL Diamond Beveling Chamfer Bits - Diamond Countersink Drill Bit 4/5 Inch with Hex Shank for Enlarging Trimming Shaping Existing Holes of Granite Marble Porcelain Tiles,Size of 0 to 20mm
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.