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Sizing Chart
Here you will find the current size chart.
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CMC
CLUTCH ™ BY HARKEN ™
The CMC CLUTCH by Harken Industrial is a multi-purpose rope device designed for rescue and rope access professionals. Developed through a collaboration between CMC and Harken—combining decades of expertise in technical rescue and high-load rope management—it brings enhanced efficiency and precise control to modern rigging systems.
Engineered for a wide range of applications, the CLUTCH is used for hauling, lowering, personal descent, easy ascending, belaying, and tensioned rope systems. It transitions seamlessly between anchor-based configurations and personal use.
- Delivers up to 38% higher efficiency in hauling and ascending compared to cam-style devices, reducing system changeovers
- Transitions between anchor-based systems and personal use, reducing the need for multiple devices
- Combines load management and descent control functions in a single device, simplifying equipment use and training
- Enables instant transitions between hauling and lowering, or ascent and descent, without transferring the load
- Ergonomic control handle provides a wide operating range for smooth, progressive lowering and descent control
- Supports twin-tensioned systems in mirrored or nested configurations (Double CLUTCH Technique)
- Replaces multiple traditional components, including pulley, rescue rack, anchor plate, load release strap, prusik cord, and carabiners
Components
- Stainless steel ratcheting sheave with rotating side plates for controlled progress capture
- Double-latched side plate enables secure rope loading, independent of the attachment point
- Integrated anti-panic brake and force-limiting mechanism for load control
- Machined aluminum chassis with stainless steel wear guards for structural durability
- Integrated becket for direct connection of mechanical advantage systems
- Removable screw pin for configuring closed rope systems when required
CLUTCH 11 mm Gray
- Item: 336011
- Color: Gray
- Rope Size: 10.5 – 11 mm
- Weight: 836 g (1.84 lb)
- Dimensions: 208 x 112 x 47 mm (8.2 x 4.4 x 1.9 in)
- Max Load: Up to 272 kg (600 lb)
- Pulley Minimum Breaking Strength (3 Sigma MBS): 40 kN (8,992 lbf)
- Becket Minimum Breaking Strength (3 Sigma MBS): 22kN (4,946 lbf)
- Certifications: NFPA (G), ANSI/ASSE, CE (EN Standards)
CLUTCH 13 mm Red
- Item: 336013
- Color: Red
- Rope Size: 12.5 – 13 mm
- Weight: 816 g (1.80 lb)
- Dimensions: 208 x 112 x 47 mm (8.2 x 4.4 x 1.9 in)
- Max Load: Up to 272 kg (600 lb)
- Pulley Minimum Breaking Strength (3 Sigma MBS): 40 kN (8,992 lbf)
- Becket Minimum Breaking Strength (3 Sigma MBS): 22kN (4,946 lbf)
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