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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.

Horseshoe Tether for Hitch Hiker

Horseshoe Tether for Hitch Hiker

Fits Hitch Hiker 2
asc184‑T2

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

Fits Hitch Hiker 2
asc184‑H

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
asc179‑r
Black
asc179‑b
Grey
asc179‑g
Gold
asc179‑gd
Orange
asc179‑or
Purple
asc179‑p
Red with 10" Tether
asc179K

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
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.

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Lawton Tether

Lawton Tether New in 2018!

asc180

The Lawton is a compact stiff tether for he 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 Nicegudave and WesSpur by Dan Lawton during the 2018 Spring Crane Safety Climber School.

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Rope Wrench Stiff Tethers

Rope Wrench Stiff Tethers

12” Stiff Tether
asc196
12” Split Stiff Tether
asc196‑o

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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Akimbo PRE-ORDER FOR 2019!

Akimbo
asc102

The much-anticipated Akimbo was unveiled at the 2018 TCI Expo by Rock Exotica, and its arrival is now within sight! The first units are expected to arrive at WesSpur in January 2019. More information will be shared as it becomes available. Please note: current photo reflects the look of the Akimbo shown at TCI Expo. Final version may vary.

IMPORTANT: Limited quantities are expected to arrive from the manufacturer in January. Because of the demand, we are accepting pre-orders now for the first shipment. Purchasing this product in pre-sale does NOT guarantee that you will receive the Akimbo in January. Manufacturer delays or more demand than supply may push back the date that you receive your item. Pre-sale ensures you will have your item reserved and you will receive your item before customers who bought after you.

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Unicender

Orange
asc144

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

asc195

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

ASC181

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

asc139‑3

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 Dyneema Kit (Dyneema Strap)

SpiderJack/Dyneema Kit
ASC173
Repl. Dyneema Kit
ASC174

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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