Precise Grinding Results , Precision Assurance within 0.02mm, Easy to Operate , grinding a drill within 10 seconds. Special Design High Accuracy Alloy Steel Collets, Accurate Grinding consumption 0.2mm High Efficiency DC motor, Stable Quality GE Diamond Dust Grinding Wheel Considerable Design, Invisible Tool Box, Delicate & Friendly Use, Portable Design with only weight 8 kgs.