The BendPak MLS-18 Mobile Jack Stand is designed to provide added support and peace of mind when working on a heavy duty vehicle on a lift that may cause a shift in its center of gravity. Each MLS-18 Mobile Jack Stand has a rated capacity of 18,000 lbs and can be adjusted from 48.75" to 74.5" in height to reach lifting points more than 6' in the air. Additionally, it features a tripod design, foldaway transport handle, and 3" diameter wheels. It's ideal for use in sets of four, six, or eight.