For 3mm-12mm End Mill Re-sharpening , Adjustable Angle Precise Grinding Results , Precision Assurance within 0.02mm Center Cutting Available High Accuracy Balance between each flute of the End Mill Easy to Operate , grinding an End Mill within 1 minute. 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 14 kgs. 30cm X 16.5cm X 24.5cm Weight 14.7 Kg