... .Drill grinder, easy operate, accurate and fast. 2.With diamond grinding wheel, long service life. 3.CE Drill Bit Grinder :Portable idiot ... reduces the cost and improves the use effect.3) With diamond grinding wheel, it can be equipped directly with an accurate angle ... : Φ3-Φ14mmPoint angle: 90°-135°Power: AC220V/180WSpeed: 5300RPMDiamond grinding wheel: CBN or SDCStandard 11 collets : Φ3, Φ4, Φ5, Φ6, Φ ...