The Northern Industrial Electric multi-task sharpener handles a variety of sharpening needs and runs on standard 110V current. * Sharpens drill bits, scissors, straight edge chisels and plane blades from 1/4in.–2in. wide * 4800 RPM free speed; max. wheel diameter 3/8in. * Drill diameter 7/64in.–3/8in. * Runs on standard 110V current