Makita 9553NBKX 4-Inch Angle Grinder Kit Protective zig-zag varnish seals motor from contaminants by forming a barrier under rotation 6.0 Amp motor design for high output poer in a more compact tool - only 3.1 lbs. Thicker coil wires are wound more closely to reduce heat and energy loss All ball bearing design and metal gear housing for durability Rotatable gear housing rotates 90 degrees for cutting applications