These Simpson Rotary Camlock Series Harnesses feature a camlock buckle constructed from CNC-machined 6061-T6 Billet Aluminum and includes hardened steel tumblers to help lock the belt tabs into place. The belts can be individually snapped in for easy operation and all can be simultaneously released with a simple turn of release rotary knob. The rotary camlock features a release knob instead of a lever to prevent accidental release. All belts are 3 inches in width, with the exception being the anti-submarine straps, which are 2 inches in width. The Simpson rotary camlock driver restraint systems are available in a variety of color and carry an SFI 16.1 certification for racing use. Sold Individually.