• movable fall arrester BACK UP is intended for ropes Ø 10 – 12 mm, length adjuster and positioning device • captures a fall, slip, or uncontrolled abseiling; it also locks in the event of an unintentional grab during a fall • it can be used on a vertical or inclined rope • moves up and down the rope without the need for an operator • easy installation at any point of the securing rope • can be used with a fall arrester with an integrated loop