Makita is one of the leading manufacturer of professional power tools on the market. The BO5031 has a high powered 300 W motor, with a large 2.8 mm random orbit action for fast and super smooth sanding. The pad control system controls the pad speed upon start up. It delivers 4,000 to 12,000 orbits per minute and 8,000 to 24,000 sanding strokes per minute. Disc size 125 mm with a 123 mm pad size.