Fall arrester for working at height. The Back-Up is a helping hand for work positioning and safety. Due to its special design it can withstand the strongest stress of a factor 2 fall. Select full locking mode to lock the Back-Up to the rope or select the semi-locking position to be able to travel up and down the rope with ease. The Back-Up will automatically lock when loaded by a fall. Supplied with OVALONE CARBON TWIST-LOCK carabiner.