Billed as the smallest and lightest 9-foot cable lifeline on the market, the Miller Black Rhino Self Retracting Lifeline (SRL) features a quick activating, internal braking mechanism to arrest free-falls within inches. All models include a swivel-locking snap hook to prevent the lifeline from twisting and tangling and an integral load indicator, which signals when a unit should be removed from service and returned for repair.