Safe and simple to use with only one hand! BAC K-UP is the revolutionary KONG fall arrester that follow the operator in both directions and stop the possible falling. 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 in semi dynamic way avoiding the shocking effects on the ropes caused by the traditional self-locking devices with toothed cams. It works also with NO-CUT LANYARD Ø 12 if used according to EN 567 and UIAA 104. Connector included: