3M Protecta Rebel Self Retracting Lifeline, 20', Galvanized Cable, Carabiner, 420 lb Capacity, 3590517 SWIVELING SELF-LOCKING SNAP HOOK WITH IMPACT INDICATOR: Automatically locks and closes for added safety, swivels to limit lifeline twisting for ease of use and provides visual indication of fall arrest. SPEED SENSING ALL METAL BRAKE SYSTEM: Stops a falling worker within inches, and provides smooth consistent operation allowing the user to maintain normal work pace and not be interrupted with constant lock ups. INTERNAL ENERGY ABSORPTION SYSTEM: Specialized internal absorption system maintains safe fall arrest forces for users and tools up to 420 lbs. (190 kg). RESERVE LIFELINE SYSTEM: Maintains a reserve for shock absorption when the entire lifeline is extended for added safety. HIGH STRENGTH, CORROSION RESISTANT COMPONENTS: Stainless steel and zinc plated steel hardware provides added corrosion resistance and extends the life of the device. SELF-LOCKING ANCHORAGE CARABINER: Self closing and self locking carabiner keeps the SRL securely attached to the anchorage device.