50 TON Hydraulic BOTTLE JACK Heat-treated extension screw allows low pick-up height adjustment and maximum lift height U.S. Patented built-in by-pass device protects hydraulic system from over pumping damage Unique cross-type forged release valve assures positive control A wide, rugged base provides stability and strength Easiest accessible pumping system eliminates off-center pumping force for the most efficient operation Capacity: 50 TON