Compact and lightweight self-jamming pulley 3-in-1 multi-purpose device (pulley, self jamming pulley, rope clamp). Efficient and compact, aluminum sheave mounted on a self-lubricating bearing. Toothed cam with self-cleaning slot: works even on frozen or muddy ropes. Cam can be locked in open position so device can be used as a simple pulley. Can be used to ascend a rope.






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