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 Light weight design (32 lbs.) for easy maneuverability Large rubberized "T" handle provides operator comfort and control Manufactured to strict ANSI portable automotive lifting device specifications and testing standards