The BuckLimiter™ is rated to 420 lbs. with triple locking aluminum carabiners on each end. This retractable features aluminum alloy construction inside and out while both the mechanism and housing is made of corrosion resistant alloy. Features a braking system that is designed for smooth consistent operation to prevent “jerky” lock-ups. A tangle free swivel top adds to mobility and a 7? extension for expanded work area.