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Lockjack & SpiderJack

A revolution when they first hit the scene, these mechanical replacements for friction hitches are now commonplace in the tool bags of some of the best tree climbers. The precision control of friction and rate of descent, coupled with the easy advancement of the Lockjack and SpiderJack make these innovative climbing tools very popular.

ART SpiderJack 3


Multi-functional, self-blocking rope control device. The running rope is directly in front of the climber so it is possible to pull and feed the rope with one hand or hand over hand into the device. Turning it to the releasing position and pressing the thumb brake needs very little force, so speed regulation is very easy, and handling is smoother. Features a secured locking position.

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Lockjack Sport with Swivel


The Lockjack can totally replace the friction hitches used on climbing lines. The Lockjack works as both an ascender and as a descender for self-belay in the doubled rope technique (DdRT). The advantage of the Lockjack is that friction is applied to the rope with a smooth aluminum surface which causes less friction while climbing for an effortless advance, and a smoother more easily controlled descent. While climbing, the Lockjack tends slack by itself as the weight of rope below the climber pulls the line through the device. Carabiners and rope sold separately.

Works with 1/2” rope. Use with a small D or Oval carabiner only. A larger carabiner may allow the wooden ball to pass through and become stuck, resulting in free fall.

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