Craftsman Wet and Dry Sharpener 21701 Features 140 watt, 1.4 amp motor. Ball bearings ensure smooth operation. Spring clamp holds work secure while sharpening. Features 2 inch WA400 grit wet wheel at 200 rpm, and 1/2 inch WA60 grit dry wheel at 1,750 rpm. Dry wheel sharpens quickly and wet stone sharpens slowly to maintain temper of steel.