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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.

Lockjack Sport

# asc116

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. Works with 1/2” rope.

Designed for use with Petzl Am’D M18 (CAR101) or M21 (CAR102).

Spiderjack II

# asc139

The newest innovation from ART (Advanced Rope Techniques), the Spiderjack is an improvement of the popular Lockjack. By allowing slack in the line above to fall through the device with even less friction, the Spiderjack makes ascents in the doubled rope technique even easier. In addition, the Spiderjack also allows finer control over friction during descents, making tasks such as limb walking even easier by permitting the user to vary friction more subtly than before. Smooth friction surface.

Works with 7/16” - 1/2” rope. Designed for use with Petzl Am’D M18 (CAR101) or M21 (CAR102).

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