PORTER-CABLE 390 5-Inch Low Profile Random Orbit Sander with Hook and Loop Pad 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 5-10 times 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 Integrated dust port accepts 1- and 1-1/2-inch vacuum hoses