The Makita 4-1/2 in. Angle Grinder has a labyrinth construction that seals and protects the motor and bearings from dust and debris for a long-life, with an additional, protective zigzag varnish that seals the motor from contaminants by forming a barrier under rotation. This UL-listed grinder provides high-output power with its 7.5 Amp motor that maintains a 11,000 RPM speed to produce excellent grinding with a 2-1/2 in. small-circumference, barrel-grip handle for added comfort. All ball-bearing design and metal gear housing provide durability. This bundle also inlcudes the A-96403, 4-1/2 in. Turbo 8 Segment Diamond Cup Wheel, Low-Vibration, Compatible with Angle Grinders with electronic controller.