WoodRiver Benchtop Spindle Sander Motor: 3-1/2-amp, 120-volt, single phase Certification: CSA certified Oscillations per Minute: 5/8" Stroke with 58 OPM Sanding Height: 3-5/8"; Drum Diameters: 1/2", 3/4", 1", 1-1/2", 2" and 3"; Drum Length: 4-1/2" Overall Dimensions: 15-9/6" w x 14-1/8" d x 17" height; Weight: 34 lbs.