This fantastic device from the boys at ART is both an ascender and descender in the one unit! The ART Lock Jack 2 works just like a climbers friction hitch by pinching the line when weight is applied. The Lock Jack Sport requires only a few feet of rope weight before it starts pulling through on its own.
The Lock Jack Sport always stays close to the harness and its low profile design makes it a dream to use.
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Price: $595.00 AUD