Jumar

Jumar1.jpg (132642 bytes)
        A Jumar is a mechanical friction device, used to ascend, or as protection while ascending a rope. Jumars are also knows as "ascenders".

 

jumar2.jpg (119196 bytes)

        In the picture above, the jumar can travel along the rope freely in the upward direction, whereas it locks when force is applied in a downward direction. The mechanical locking device grips the rope, preventing the jumar from travelling along the rope in a downward direction.