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Mechanical Friction Devices

A new wave of mechanical friction devices bring ultimate control to tree climbing systems. These devices can be used to augment or replace friction hitches for smoothly-controlled ascents and descents.

Zigzag by Petzl

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The popular Zigzag mechanical prusik has been redesigned! The ZIGZAG allows the user to move around efficiently in a tree using classic Prusik pulley system technique. The friction chain provides precision and fluidity when moving around. The pulley is mounted on sealed ball bearings for easy slack-tending. Can be used on either doubled ropes or a single rope (by using the separate Chicane add-on).

The Zigzag is redesigned with a fixed lower attachment hole to ensure alignment of the device with the axis of the worker and optimize grip.

Zigzag Plus by Petzl

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Redesigned Zigzag, the Zigzag plus lower attachment hole has a high-efficiency swivel, to ensure stable positioning and optimal rope glide.

The ZIGZAG allows the user to move around efficiently in a tree using classic Prusik pulley system technique. The friction chain provides precision and fluidity when moving around. The pulley is mounted on sealed ball bearings for easy slack-tending. Can be used on either doubled ropes or a single rope (by using the separate Chicane add-on).

Note: Chicane needs to be used with H-frame Petzl OK or Am'D carabiners for proper fitting.

Chicane by Petzl

Chicane
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The CHICANE allows ZIGZAG and ZIGZAG PLUS mechanical Prusiks to be used on single ropes. It provides continuous additional friction on descents. The excellent compatibility of the CHICANE and mechanical Prusik as an assembled unit ensures smooth rope glide through the brake during ascents. The ergonomic handle provides excellent grip and facilitates movement while limb walking. Thanks to the openable side plate, installation is quick and easy.

Hitch Hiker

Hitch Hiker 2
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Please note: We are not expecting a restock of the Hitch Hiker until 2020.

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 2 advances smoothly and engages instantly when weighted, with easy slack tending, and may be used in double or single rope systems.

The dog bone where the hitch cord runs through slides up behind your hitch when you advance, taking the weight off your cord and tending your hitch. When you weight the Hitch Hiker 2, the dog bone and carabiner are pressed into the rope for additional friction. The pressure of the dog bone and carabiner on the rope takes some of the pressure of your body weight off the hitch, allowing you to climb on your Friction Hitch in SRS.

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.

Holster for Hitch Hiker

Holster for Hitch Hiker

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.

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...

Lawton Tether

Lawton Tether

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The Lawton is a compact stiff tether for the Ropewrench. At 7.5" this tether shaves almost 3" from your tending system when coupled with a compact oval carabiner. It is easy to remove from the rope and hitchclimber pulley making a very clean transition from SRS to MRS. Included is 5' of tarred whipping twine to seize the eye of the tether to the carabiner. Works well with the DMM Perfect O, RockO, or Camp Oval carabiners.

The Lawton Tether idea was brought to Niceguydave and WesSpur by Dan Lawton during the 2018 Spring Crane Safety Climber School.

Rope Wrench Stiff Tethers

@Height Stiff Tether for Rope Wrench

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.

ISC Rope Wrench Pulley

ISC Rope Wrench Pulley

Red
PUL151
Black
PUL151
Grey
PUL151
Gold
PUL151
Orange
PUL151
Purple
PUL151

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.

Akimbo

Akimbo
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The Akimbo is a unique arborist climbing tool that enables the climber to ascend, descend and position on both stationary rope and moving rope systems.

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.

Read reviews

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.

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.)

Read reviews

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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