50 lbs. of force on foot pump, exerts 400 lbs. at capacity Foot pump provides additional range for easy operation Ball bearing post support with large "T" handle screw column provides smooth positioning of exact height adjustment Solid 12" (305 mm) diameter base supports lightweight slender design for maximize work area and storage space. Heavy duty steel frame construction with rust resistant finish for longer tool life Foot pump folds for convenience Lightweight design (35 lbs.) for easy maneuverability Manufactured to strict ANSI portable automotive lifting device specifications and testing standards