Heavy duty hydraulic performance for garages, equipment dealers, commercial service and more Welded hydraulic pump and cylinder construction provides increased strength and leak prevention Chrome plated ram for additional rust resistance, wiper seals protect hydraulic system from contaminants and convenient foot pedal for no load lifts Front wheels with roller bearings and ball bearing - mounted rear caster wheels provide stability and easy maneuverabilty Overload and by-pass safety valves prevent use beyond the jacks rated capacity and over extension of the ram