ISC Rope Wrench (Double Tether)

The ISC **Rope Wrench (Double Tether)** is a revolutionary friction device for **SRT climbing** (Single Rope Technique) that has transformed the arborist industry. With its double tether, it creates an "enclosed double-rope system" on a single rope strand by producing a bend in the rope above the climber's hitch. This provides even friction throughout the climb, ascent, descent and lateral movements around the tree – something impossible with traditional double-rope technique (DdRT). Easy installation thanks to the centre-line pin and bolt for quick tether attachment. The device is lightweight, robust and certified for professional use.

Features

• Revolutionises SRT climbing with a constant friction level at the hitch
• Creates an "S-bend" in the rope for optimal load distribution between wrench and hitch
• Centre-line pin for easy installation on the climbing rope without taking the rope down
• Hex bolt for quick attachment of the rigid double tether
• Easy to handle during ascent, descent and horizontal movements
• Compatible with favourite hitches such as the Distel (5 wraps recommended)
• Works with ropes from 11-13 mm diameter
• Aluminium construction with stainless steel components for durability and low weight
• CE-certified to EN12278:2007 for climbing devices
• Not intended as primary life-supporting equipment

Technical specifications

• Material: Aluminium / stainless steel
• Rope diameter: 11-13 mm
• Dimensions (without tether): 109 x 54 x 37 mm
• Tether length (double tether): 30 cm
• Weight: 205 g
• Certification: CE 0120 / EN 12278: 2007
• Colour: Red (standard)

Usage tip: Install the tether with reversible thread-locking fluid to prevent loosening. Combine with rigid tethers such as the FIX or Squirrel for best performance. Tested with compatible ropes such as Sterling, Teufelberger and Stein.