3.5 Amp EnduraTech Motor for increased performance and durability. Electronic Load Control for 42 percent faster material removal. EnduraTech Motor Technology has 71 percent fewer wear components for 5-10x longer motor life. Electronic motor brake reduces spin-down time by 73 percent for increased productivity. Mechanical pad brake reduces free-spin to virtually eliminate gouging. Low profile design reduces sander height by 31 percent for better control and finish. Variable-speed, 7,000 - 12,000 OPM for optimal removal rate on a variety of materials. Optimized ergonomics with rubber grip for comfort and control. Integral dust port accepts 1 inch and 1-1/2 inch vacuum hoses for optimal dust collection. 3/32 inch Orbit Diameter.