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Mechanical Friction Devices

A new wave of mechanical friction devices bring ultimate control to arborist climbing systems. These devices can be used to replace friction hitches in Doubled Rope climbing systems for smoothly-controlled ascents and descents. The Unicender. has the additional flexibility of being excellent for use on Single Rope climbing systems. These devices are more expensive than a traditional friction hitch using a prusik or split tail but for competition or high-production level climbers, they offer great benefits in speed and control. Click on any of the "More Info" links below to learn more.

RopeTek Hitch Hiker 2

Hitch Hiker 2
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New, more compact Hitch Hiker 2 now available!

The Hitch Hiker 2 incorporates a steel friction device with your hitch cord to produce a great device for hybrid tree climbing systems. The Hitch Hiker advances smoothly and engages instantly when weighted, with easy slack tending, and may be used in double or single rope systems.

The Hitch Hiker is sold complete with steel carabiner and 4' of Sterling RIT cord. You may pick up extra hitch cord from the choices above or those on our prusik cords page.

Hitch Hiker Video Overview

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Horseshoe Tether for Hitch Hiker

Horseshoe Tether for Hitch Hiker

Fits Hitch Hiker 2
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This sewn tether is a durable, compact tether which fastens to the oval carabiner and a chest harness or shoulder strap to help tend the Hitch Hiker in SRT climbing.

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Holster for Hitch Hiker

Holster for Hitch Hiker New in 2017!

Fits Hitch Hiker 2
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The Holster is the best option we've seen for tending the Hitch Hiker 2. Super easy to install, and provides great slack tending.

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Singing Tree Rope Wrench ZK-2

Red
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Black
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Grey
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Gold
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Orange
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Purple
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Red with 10" Tether
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The Rope Wrench ZK-2 friction device allows climbers to ascend, descend and work the tree "Single Rope" with their favorite friction hitch. While the Rope Wrench ZK-2 is not for use as your life support device, it places a bend in your climbing line and takes just enough pressure off your hitch, allowing you to climbing on your friction hitch SRT with greater ease. Improved version in 2012 with aluminum frame, integrated pulley, swinging sideplates, and smaller profile.

Read more about the Rope Wrench ZK-2...

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ISC Rope Wrench Pulley

ISC Rope Wrench Pulley

Red
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Black
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Grey
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Gold
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Orange
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Purple
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ISC pulley built this pulley to work with the stiff tethers used with the Rope Wrench ZK-2. The wide spacing between the swinging side plates provides plenty of room for various tethers. The Rope Wrench pulley will work with spliced or hand-tied prusik cords.

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Rope Wrench Stiff Tethers

Rope Wrench Stiff Tethers

12” Stiff Tether
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12” Split Stiff Tether
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Sewn stiff tethers for use with the Singing Tree Rope Wrench. One eye features a rubber grommet to aid in positioning.

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Unicender

Orange
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The Unicender can replace friction hitches, figure 8s, and ascenders! In the doubled rope technique, the Unicender can be used as a mechanical split tail in place of a friction hitch. Because of the ease with which it advances in this configuration, it makes any rope climbing technique easier and faster. In the single rope technique, the Unicender takes the place of both ascenders and descender. Works on 7/16” to 1/2” lines.

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Singing Tree Rope Runner

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The Singing Tree Rope Runner is a single rope ascent and descent device for 11-13mmm 24-strand ropes. The Rope Runner provides smooth control of the rate of descent for the climber on single, 24-strand line. Color may vary.

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Petzl Zigzag Mechanical Prusik

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The Zigzag mechanical prusik for arborists combines all the individual pieces of gear being used in doubled rope climbing into one slick device. The Zigzag functions like a prusik, slack tending pulley, and swivel all in one.

Friction is managed by running the climbing line through the linked "zig-zag" pattern of rings. The top ring is a lever, and pushing down on this lever releases pressure in the rings, and the climber descends - just like using a prusik cord. Release the lever and the Zigzag jams, stopping descent. The climber has control over the rate of descent through varying the pressure on the Zigzag lever.

Climbing on the Petzl Zigzag is just like climbing on your prusik and pulley, but with all of your hardware integrated into a single mechanical prusik.

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ART SpiderJack 3

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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 Dyneema Kit (Dyneema Strap)

SpiderJack/Dyneema Kit
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Repl. Dyneema Kit
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The popular SpiderJack 2.1 from ART (Advanced Ropeclimbing Technology) is now available with the mounted Dyneema Kit (included). 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 Dyneema Kit 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 Dyneema Kit 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.

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SpiderJack 2.1

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The newest innovation from ART (Advanced Ropeclimbing Technology), 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. Carabiners and rope sold separately.

Works with 7/16” - 1/2” rope.

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Lockjack Sport

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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.

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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