Safe and simple to use with one only hand! BACK-UP is the new KONG fall arrester that follow the operator in both directions and stop the possible fallings. Shifting the special button on the lock mode, it can be used also as a positioning device or a normal locking device. Due to its special manufacture, BACK- UP supports also the strongest stress (fall factor=2) in semi-dynamic way, and it avoids the shocking effects on the ropes caused by the traditional self-locking devices with toothed cams. Back-Up #802 fall arrester for 10-11-12mm ropes. EN 353/2 - EN 358 EN 567 - EN 12841/A-B