Tool-less, quick change system to accommodate diamond polishing heads, pad holders, and brushes. Catalytic muffler for low emissions and quiet operation. Heavy duty gearboxes with shear couplings to protect your investment. Integral skirt contains splash and allows drivers within 3/8" of walls and other structures. 7-gauge metal construction with hammer tone powder coat finish. Non-marking, foam filled wheels. Adjustable engine speed for various applications.