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Rope Wrench Kit

Rope Wrench Kit
Rope Wrench Kit image

Rope Wrench Kit

Buy Rope Wrench Kit


This kit provides all the hardware needed to use the Rope Wrench for Stationary Rope System (SRS) climbing. Rope sold separately. If you are buying this to go along with a rope climbing starter kit, you’ll want to upgrade your rope to one that works well in SRS.

    Kit contains:
  • ISC Rope Wrench (ASC179)
  • ISC Phlotich pulley (PUL160)
  • Turbo foot ascender - right (ASC190-R)
  • RockO carabiner x 2 (CAR136)
  • Bailout XL 9mm x 30” (CLI369)
  • Lawton Tether (ASC180)
  • Petzl Torse chest harness (SAD405)
  • DMM XSRE accessory carabiner x 2 (CAR318)

Consider ordering a floating knee ascender like the SAKA to complement this kit.


Advantages of the Rope Wrench

The SRT Advantage: Climbing SRT has many advantages. It allows the climber to ascend at a 1:1 rate of speed. For every foot they pull on the rope they ascend one foot. This is different from the conventional DdRT (double rope technique) configuration of 2:1. In DdRT the climber must pull two feet of rope to advance one foot.

The Wrench Advantage: Using a Rope Wrench has advantages over many other SRT systems as well. Climbing with mechanical ascenders allows one to rapidly ascend the rope but the climber must perform a changeover to descend. The Rope Wrench dissipates friction and heat away from the climbers friction hitch allowing the climber to descend.

The Rope Wrench is essentially a descent device that has a neutral gear that allows it to ascend the rope as well. Because of this neutral gear, it is imperative that the Rope Wrench be used with a sturdy and trusted friction hitch.

Configuring the Rope Wrench

There are many ways to configure the Rope Wrench properly, but the climber must be secured to both hitch and Rope Wrench. Any hitch that works safely in DdRT should work with a Rope Wrench. The Rope Wrench is the "limb that goes with you". It provides the same service to your climbing hitch that the tree limb or cambium saver provides in DdRT

Friction Adjustment: The ZK-1 allows the tree climber to adjust the amount of friction they prefer by sliding the bottom friction bolt up or down before locking it into place. The ability to adjust the friction is very important as it allows a climber to fine tune the Wrench to their climbing line and hitch combination.

Tether Selection: The tether of the rope wrench should be installed in a manner that gives the friction hitch enough room to function properly but short enough to not be sloppy in the climbers system.

Rope Wrench ZK-2 for Use by Trained Climbers

The Rope Wrench ZK-2 is recommended for tree climbers who have a working knowledge of Single Rope Technique. This means you have received qualified training and have practical experience climbing SRT.

Rope Wrench Instruction Sheet from ISC

Rope Wrench ZK-2 Instructions.

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