Mac Tools' 6-ton Spring Assist Stands, No. JS6MJK, offers shops a fast lift for professional performance. Unlike traditional jack stands, its rack bar quickly raises to its desired support point, thanks to its spring loaded technology. Made with a heavy gauge, steel frame, the tool's construction helps prevent distortion and twisting. The stand has a counter-weighted pawl that locks the racket bar securely in place and can reach a maximum height of 24-3/8". It weighs only 35 lbs.