Harken-CMC Clutch

The CMC Clutch is the latest evolution in rope access and rescue hardware.

Introducing the all-new CLUTCH, the latest evolution in rescue and rope access hardware that enables the technical rope professional to do more with less. This multi-purpose device was designed and engineered in collaboration by two companies with a collective 90 year history in rope management under heavy loads: CMC, a company with roots in rescue and rope access, and Harken Industrial, a manufacturing company with roots in high performance sailing.

Suited to a multitude of rigging operations, the CLUTCH delivers efficient operation, ease of use, and optimal control. It moves seamlessly between anchor-based systems and personal use, offering unmatched versatility for the rope technician. With the CLUTCH, more is possible.

Product Sheet

Product Sheet 2

Clutch user manual 11mm


  • Single wearable tool for efficient hauling, controlled lowering, smooth personal descent, easy ascending, belaying, and Twin Tension Rope Systems.
  • Delivers up to 38% higher efficiency in hauling and ascending than a cam-style device: reducing changeovers.
  • Moves seamlessly between anchor-based systems and personal use: reducing gear cache volume and weight.
  • Combines the key features of personal descenders and load management devices: reducing equipment training and cost.
  • Instantly transitions between hauling and lowering or ascent and descent without having to transfer the load.
  • Allows main and belay lines to be mirrored, twin-tensioned, or nested in Double CLUTCH technique (handles controlled by single operator).
  • Replaces 8 pieces of traditional equipment: pulley, rescue rack, anchor plate, load release strap, prusik cord, and 3 carabiners.
  • Suited for hauling, controlled lowering and descent, ascending and belaying
  • Stainless steel ratcheting and rotating sheave for efficient and audible progress capture
  • Rope loading/unloading is secured with an independent double-latched side plate
  • Anti-panic brake and force limiting features ensures operational safety and overload protection
  • Aluminium chassis with stainless steel wear guards for lightweight durability
  • Integrated becket allows for direct connection of mechanical advantage systems
  • NFPA G rated when combined with CMC's G11 11mm lifeline rope
  • Certified to ANSI Z359.4, EN12841/C, 341/2A and 15151/8
  • A 13mm version is anticipated 



Rope Size

10.5 - 11 mm    

Weight 836 g
Dimensions 208 x 112 x 47 mm     
Max Load 272 kg
Pulley MBS 40kN
Becket MBS 22kN