Jumar
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A Jumar is a mechanical friction device, used to ascend, or as protection while ascending a rope. Jumars are also knows as "ascenders". |
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. |