Makita 9557NB Angle Grinder 4-1/2"Highlights: 7. 5 AMP motor for high output power in a more compact tool (only 4. 5 lbs.) AC DC switch for use with alternative power source Small diameter barrel grip (only 2 1 2") for added comfort Labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life Protective zig zig varnish seals the armature from dust and debris for longer tool life Thicker coil wires are wound more closely to reduce heat and