The height of the Topside Creeper can be adjusted to allow usage on many different types of vehicles (adjust from 48" to 64" tall). It is constructed of heavy gauge steel and has a powder coat finish to protect from scratching and has a 400lb weight limit. The deck is padded and covered with a heavy vinyl for comfort and durability. The key is comfort, stability and maneuverability. It allows you to reach the back of the engine compartment without having to climb on the vehicle and allows extended periods of time without fatigue in the legs and lower back. The great feature is that it can easily be folded for storage. The Topside tool tray is a great complement to the topside creeper to help complete your garage.