A must for anyone who drives an open cockpit car, RaceQuip Arm Restraints are manufactured using premium polypropylene webbing and high grade steel hardware. RaceQuip's standard arm restraint design utilizes 2" webbing for the cuffs and 1" webbing for the tethers that are attached to the cuffs. The cuffs are adjustable from 7" to 15" and the tethers adjust in length out to 15" so they work for most children and adults. The steel ring at the end of the tether is designed to slide over your shoulder harness end link so they release with your belts.