Grip Electric Chainsaw Sharpener UL Precision angle adjustments 4,200 rpm max. grinding speed Large side safety guard 60 Hz, 85W. UL / CUL-listed. Requires standard 120V power - See more at: http://www.sportsmansguide.com/product/index/grip-on-electric-chainsaw-sharpener?a=887706#sthash.4JAkqAjD.dpuf