BUCKTOOL 250mm Variable Speed Sharpener 90-160RPM Two-Direction Water Cooled 220 Grit Wet and Dry Sharpening System, SCM8103Variable speed: powerful S1 90W and S6 40% 150W motor, rotates with variable speed of 90~160 rpm for maximum precision when sharpening. The Bucktool wet grinding system can control the speed according to your preferences Cooling effect: 250 mm aluminium oxide grinding wheel and 200 mm leather grinding disc for polishing and finishing your sharpened tools. The water tank can keep tools cool during sharpening and prevent deposits, allowing woodworkers