The 30570 Astro Pneumatic 20V 7'' Brushless Variable Speed Rotary Polisher W/ 2 Batteries features a brushless 20V motor for efficiency and power with 6 adjustable soft-start speed settings from 400-2,200RPM. Perfectly balanced at the hand and weighs 1lb less with battery attached than the industrys most popular corded 7'' polisher. Includes two 4.0Ah batteries and charger for reduced downtime. The 30570 Astro Pneumatic 20V 7'' Brushless Variable Speed Rotary Polisher's bale handle design allows for vertical or horizontal gripping.