Super Joint System (SJS) technology helps prevent gear damage caused by accidental wheel binding Powerful 13.0 AMP motor delivers more output for increased performance Electronic speed control maintains constant speed under load Soft start feature for smooth start-ups Rotatable gear housing can be positioned every 90° Labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life Large paddle switch for comfortable operation "Tool-less" wheel guard adjustment for easy clamping Refined design at only 5.3 lbs. for reduced operator fatigue Ideal for welders, fabricators, masons, maintenance/repair and more