Clutch cmc rescue. Stainless steel ratcheting and rotating sheave provide efficient and audible progress capture. Stainless steel ratcheting and rotating sheave provides efficient and audible progress capture. COMPONENTS. Single wearable tool suited for efficient hauling, controlled lowering, smooth personal descent, easy ascending and belaying. KEY FEATURES. . It moves seamlessly between anchor-based systems and personal use, offering unmatched versatility for the rope technician. Suited to a multitude of rigging operations, the CLUTCH delivers efficient operation, ease of use, and optimal control. Patented. With the CLUTCH more is possible.