... wheel, long service life. 3.CE, patent Drill bit grinder Mr-26D (Patent)Portable idiot drill grinder, twist drill grinder, Universal ... : AC220V/180WSpeed: 4000RPMDiamond grinding wheel: CBN or SDCStandard 14 collets : Φ13, Φ14, Φ15, Φ16, Φ17, Φ18, Φ19, Φ20, Φ21, Φ22, Φ23 ... ×220cm Net weight: 26Kg Gross weight: 27Kg Drill Bit Grinder MR-26D