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ISC Squirrel Tether
ISC Squirrel Tether
ISC Squirrel Tether
  • SKU: RT290A2
  • Availability: In stock Many in stock Out of stock You can purchase this product but it's out of stock

ISC Squirrel Tether

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The ISC Squirrel Tether, manufactured exclusively in Wales, UK, is the only Aluminium tether specifically designed for optimal use with the ISC Rope Wrench. This unique, low-friction tether ensures maximum climb efficiency and efficient engagement during lateral movements and descent, while the stopper bollard keeps the Rope Wrench correctly positioned and prevents pinching or squashing the user's hand.

The ISC Squirrel Tether is manufactured from Aluminium, which ensures that twist and flex in the Rope Wrench system, is minimal.  This means that the Rope Wrench remains in the optimal low friction position during ascent, (allowing the climber to achieve maximum climb efficiency), and ensures that the Wrench engages efficiently, as required during lateral movements and descent.

The Squirrel is fitted with a stopper bollard, which keeps the Rope Wrench correctly positioned, to ensure correct engagement on the rope.  The stopper bollard also prevents the Rope Wrench from pinching/squashing the user's hand.  This means that the user can safely handle the upper or lower part of the tether, when tending/adjusting the system, on the rope.

The Squirrel can be used with an SRS Chest Harness, for hands-free tending of the system, while ascending.  The Squirrel offers a choice of four SRS Chest Harness attachment points, allowing users to position their harness, according to the type of chest harness used- and to their personal preference.

The secondary aperture of the Squirrel Pulley provides an attachment point for the addition of a secondary system, which means that the Squirrel system can be used for rescues.

The Squirrel can be used with the 11-13mm Rope Wrench (RP280) and /or the new 13mm-optimised Rope Wrench (RP283).

Technical Information

  • Compatible with rope diameter (mm) -11-13mm
  • (MBS) Minimum Breaking Strength (kN) - 24
  • (MBS) Minimum Breaking Strength (lbf) - 5400
  • ANSI compliant version - As standard
  • Serial numbering - As standard
  • Finish - Anodised
  • Weight (grams) - 350
  • Weight (ounces) - 12
  • Height (mm) - 319
  • Height (inches) - 12 9/16"

Approved Standards


  • RT290A2 Squirrel Tether 'Part of Kit KT282'
  • (The KT282 Rope Wrench Kit is CE Certified to PPE Regulation 2016/425).
  • RT290A1 Squirrel Tether 'NOT for PPE'- available OUTSIDE of Europe, ONLY
  • Meets ANSI Z133.3


The Squirrel is compatible with all Rope Wrench models. When used with the 13mm-optimised Rope Wrench, the Squirrel requires 2 x Spacers (supplied as standard).