GD-13 Drill bit grinder Easy to operate, unskilled workers can learn to sharpen the drills quickly. Economical price, grinding fast and high accuracy. Diamond grinding wheel. Low maintenance, good grinding result. Motor is electronic and powerful, frequency stably, extra motor life. Specification Drill size: Dia.3 ~ Dia.13mm Point angle: 118° ~ 135° Power supply: Single phase AC 110V AC 220V Motor: 1/4HP 180W R.P.M. of motor: 5,300rpm Diamond grinding wheel: CBN#200 Weight: N / W: 9.5kgs, G / W: 10kgs Packing dimensions L x W x H: 31 x 17 x 19cm Standard accessories Collect: Dia.3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13mm collect holder set hexagon wrench 4mm