The Makita 9557PB 4-1/2 in. 7.5 Amp Paddle Switch Grinder 7.5 AMP power with comfort and motor-protection features for longer-lasting industrial performance. The angle switch grinder delivers 11,000 RPM, with soft start for smooth start-ups. The switch 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 from dust and debris. Powerful 7.5 AMP motor delivers 11,000 RPM for high output power Compact design of the Makita switch grinder has a small 2-1/2 in. diameter barrel and weighs only 4.5 lb. for added comfort Labyrinth construction seals and protects the drive gear and bearings from contamination for longer tool life Lock-on/off feature for continuous operation AC/DC switch for use with alternative power source Protective zig-zig varnish seals the armature from dust and debris for longer tool life Extra large paddle switch for comfortable operation Thicker coil wires are wound more closely to reduce heat and energy loss All-ball bearing design and metal gear housing for durability Push button spindle lock for operator convenience Side handle can be installed on either side of the paddle switch grinder