... .CE Drill Bit Grinder :Portable idiot drill grinder, twist drill grinder, Universal small drill grinder, universal big drill grinder, universal precision drill sharpener ... the centre spot at random instead of centre drill, escape of chips easily, drilling with a light ... -Φ14mmPoint angle: 90°-135°Power: AC220V/180WSpeed: 5300RPMDiamond grinding wheel: CBN or SDCStandard 11 collets : Φ3, Φ4, Φ5, Φ6 ...