20 TON Hydraulic IN-LINE SHORTY 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 Inline pump allow for easy jack positioning under load Capacity: 20 TON