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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


The SpiderJack has been revised and improved with feedback from years of testing and development. The SJ3 has many innovations, such as a replaceable wearing pin in the rope channel, allowing you to keep the device in service longer. The SJ3 has a maximum working life of 10 years!

The new design makes the SJ3 easy to use by right or left handers, with smoother operation, better speed regulation and control, and a secured locking position. An integrated pulley under the body of the device improves function with deflected rope angles. The SpiderJack 3 is supplied with two cams - one for 11 to 12mm ropes, and one for 12 to 14mm ropes. Stainless steel body and housing. Weighs 500 grams (about 1 lb.) Tensile Strength 22 kN, max working load 200 kg (440 lb.)

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SpiderJack 2.1 with DyneemaKit (Dyneema Strap)

ASC173 Special order item
Repl. DyneemaKit
ASC174 Special order item

The popular SpiderJack 2.1 from ART (Advanced Ropeclimbing Technology) is now available with the mounted DyneemaKit. The Dyneema sling is attached on the body of the device with a lower ring to be attached onto the carabiner (before climbing, always verify that the ring of the DyneemaKit is connected onto your carabiner!). On the other end of the sling, you can attach a carabiner for the spliced end of your rope. The DyneemaKit allows you to change the climbing system much more easily than before when climbing with more than one rope and anchor point. Carabiners and rope sold separately.

Works with 7/16” - 1/2” rope.

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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