... function can control the quality . precision drill re-sharpener grinder is designed for twist drill(gd-26)Easy to operate, unskilled workers ... and powerful, frequency stably, extra motor life. Standard accessories Collect: Dia. 13, 14, 15, 16, 17, 18, 19, 20, ... collect holder set hexagon wrench 5mm Specification Drill bit grinder Drill size Dia.13~ Dia.26mm Point angle 165~180degree Power supply ...