... portable type,grinding 2,3,4,6 blade of general end mill. it is for endmill grinding machine,capacity 3-13mm ... can learn to sharpen the drills quickly. Economical price, grinding fast and high accuracy. Diamond grinding wheel.Low maintenance, good grinding ... , 6, 7, 8, 9, 10, 11, 12, 13mm collect hexagon wrench 4mm