Makita 9557PB 4‘1/2" Paddle Switch Angle Grinder, with AC/DC SwitchMakita 9557PB Makita 4 1 2 Angle Grinder combines 7. 5 AMP power with comfort and motor protection features for longer lasting industrial performance. The 9557PB Angle Grinder delivers 11,000 RPM. The Angle Grinder also features a range of durability features including labyrinth construction which seals and protects the motor and bearings from dust and debris for longer tool life, as well as a protective zig zig varnish engineered to seal the armature