Cool-running large frame motors (AC or DC rectified) with all steel planetary gearboxes. Powder coated aluminum chassis is chip-resistant and corrosion resistant. Cam latch handle allows operator to adjust handle to any comfortable height. Metal on/off triggers with dual-deadman switch system for operator safety. Heavy gauge axle and extra wide solid wheels provides easier handling and transport. Continuous water feed hook-up or 4-gallon solution tank for dispensing of liquids. Special balanced pad driver holds synthetic pads or diamond discs firmly.