Product Introduction 1. Portable drill grinder, with Taiwan grinding wheel, it can be equipped directly with an accurate angle and long service life. 2. Patent product, it can sharpen the drill bit's point thinning, lip relief angle and point angle, you can control the centre spot at random instead of center drill, escape of chips easily, drilling with a light heart. 3. It is better to grindi the drill dia. from 3mm to 13mm. 4.Standard with CBN grinding wheel for the HSS material, Optional SDC grinding wheel for the carbide material. SPECIFICATION  Model MR-13D Grinding Range ?3(2)-?13(?15) Point Angle 90°~135° Power AC220V Motor 120W Speed 4800rpm Machine dimension 29*15*16cm Packing dimension 32*18*19cm Net weight 9.8kg Gross weight 10kg Standard Equipment grinding wheel :CBN (for HSS) ×1 eleven collets: ?3??4??5??6??7??8??9??10??11??12??13 collet chuck:(?2-?14) ×1 Option Equipment grinding wheel :SDC (for Carbide) seven collets:?2??2.5??3.5??4.5??5.5??14??15 collet chuck:?15 SPARE PARTS Two hex wrench:3mm/5mm