BTBLBITS Diamond Beveling Chamfer Bits - Diamond Countersink Drill Bit 4/5 Inch x 5/8"-11 Thread for Enlarging Trimming Shaping Existing Holes of Granite Marble Porcelain Tiles - Product Features
- Diameter 20MM;Workable Width 20mm;Total Length 40mm.Chamfer angle: top angle 56 degree; Grit:#80.Recommend RPM: 6000-11000RPM.Used on 5/8\"-11 angle grinder.