Variable speed control dial enables user to match the speed to the application ,Soft start feature for smooth start-ups ,Electronic speed control maintains constant speed under load,Common fitting accepts the most popular water hose connections,Powerful 7.9 AMP motor with less weight (5.1 lbs.) ,High power-to-weight ratio for reduced operator fatigue ,Housing cover protects the industrial die cast aluminum gear housing ,3 holes at the spindle top evenly spread water to the pad and prevents the pad from clogging ,Overload switch to protect armature failure .Includes a ground fault circuit interrupter (GFCI) plug