The BO5041K features a Makita-built 3 AMP motor with over-sized sealed ball bearing construction for longer tool life. The variable speed control dial (4,000 – 12,000 OPM) allows the user to match the sanding speed to the material, with a large two-finger trigger switch with conveniently located lock-on button for continuous use and increased operator comfort. The large 1/8-inch random orbit action delivers fast and smooth sanding and a swirl-free finish, with a pad control system for controlled pad speed upon start-up.