This recovery package was designed for light duty recovery operators to uprightpassenger vehicles from their roof. The roll-over stiff leg is an excellentdevice for up righting an overturned vehicle, because the compression load onthe stiff leg will force the vehicle to turn on its axis. Once the vehicle ison its side, the stiff leg will fall out as you continue to upright.WreckMaster offers this package in three different sizes depending on theweight of the causality that you will be uprighting. Each package comes with a4 ft chain with a grab hook on each end and a 2 ft chain with a grab hook oneach end as well as the stiff leg made from schedule 80 PVC pipe. Roll-Over Stiff Leg Sizes Available: 1/4″, 5/16″, 3/8″