Finishing sander delivers fast, smooth performance Makita U.S.A., Inc.'s finishing sander, No. BO4556K, features 14,000 OPM for fast and smooth finishing sanding, reduced vibration and a rubberized palm grip for better control. An ergonomically designed rubberized palm provides even pressure and easy control, and the all-ball-bearing construction significantly reduces vibration and noise. The sander's rubber sealed switch prevents dust contamination and increases durability; while a through-the-pad dust collection system helps provide a cleaner work environment.