ART SpiderJack 2.1: multifunctional and dynamic

ART SpiderJack 2.1 DyneemaThe SpiderJack 2.1 by Advanced Ropeclimbing Technology serves as a multifunctional, self-blocking control device for the running double rope. Subject to adequate training, the SpiderJack allows for very dynamic movements in the tree. It makes slack-rope build-up during ascent a thing of the past and speed is always controllable. The SpiderJack’s free rope movement cobined with spontaneous and secure locking under load are primary avantages and why it has become legendary. Not only do the growing number of happy SpiderJack 2.1 using Arborists underline its quality and value. It is also fact, that oustanding tree climbers are using the SpiderJack in national and international tree climbing championships, and more often than ever achieving top placements.

Extremely smooth rope passage even when under load

As soon as you pull the line above the device, the SpiderJack turns from blocking into self-tending position. This allows for one-handed shortening and lengthening under load, even when there is only little rope weight below the device for speeding up the rope run. Complete efficiency at work!

Thumb brake allows for precise control of speed

With practice the unique thumb brake will allow very precise control of the rope’s running speed. Trained experts really enjoy the SpiderJack’s induced high-speed precision landings. Of course the brake system works just as well in “normal” use. The brake pad is made of Pock Wood (guaiacum), a very hard wood, oustandingly friction resistant and extremely durable.

Abrasion bolt

The body of the SpiderJack 2.1 provides a so-called abrasion bolt hidden in the rope duct. It has to be renewed if the device starts to slip on the rope under load, even if a new clutch had been installed. In this phase, the outlines of the exposed precision ground abrasion bolt are showing. The newly installed abrasion bolt is clearly protruding. Every SpiderJack 2.1 is shipped with an extra abrasion bolt! The existence of the abrasion bolt in the SpiderJack 2.1 is indicated by the number 1. So only a SpiderJack with the addition 2.1 provides such an abrasion bolt.

Pock wood

The SpiderJack brake-lever is made from pock wood, an especially hard and oily wood. Most of the precious pock wood comes from Central America, traded only under strict legal control. Its botanical name is Guajacum. Depending on its geopgraphical origins, Guajacum carries additional names like “coulteri” (Mexico) or “officinale” (Antilles). In Europe the name “pock wood” derives from the times, when its resin was used in the fight against pox. Because of its high proportion of oil and its great density, pock wood is a well known natural product featuring an outstanding abrasion resistance. Even the drive shafts of steam ships were mounted on pock wood. It is well known, wood is a poor conductor of heat, even more so with pock wood. So naturally, controlling a rope with the SpiderJack’s pock wood brake conducts very little heat.

Video: ART SpiderJack 2.1


The SpiderJack requires the use of a harness with a low attachment point. The lower the SpiderJack is attached, the longer and the more efficient the arm pulls.

SpiderJack 2.1 features:

  • ART SpiderJack 2.1 Basicpatented
  • certified according to EN 358
  • multifunctional ascend and repelling device for the running double rope
  • use with textile ropes according to EN 1891, Ø 11–13 mm
  • body and parts made of aluminium machined in the solid
  • service life: 5 years
  • tested with 15 kN/3 Min.
  • breaking strength: 28 kN
  • weight: Basic: ca. 245 g, Dyneema: ca. 280 g