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The D4 Work/Rescue Descender features a unique and innovative cam action, which offers precise control at slow or fast speeds. The progressive cam works by way of one cam operating inside another cam. The D4 is the only ANSI certified descender on the market today.

• Weight: 655 grams (23 ounces)
• Strength: MBS 16kN (3597lbf)
• For use with single ropes from 10.5 - 11.5mm (7/16")
• Working Load Rating (WLL): 240kg (551lbs.)
• Certifications: CE EN12841, NFPA 1983, ANSI Z359

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We chose stainless steel over aluminum because of its "wearever" qualities. In order to compensate for the reduced friction inherent in stainless bars, we increased the radius of the friction surface to a full 1/2". Learn More

An auto belay is an automatic belay device that eliminates the need for a human belayer. In the case of the Head Rush TRUBLUE Auto Belay, it uses Head Rush's patented self-regulating braking system, which is enabled by non-contacting magnetic braking technology. Learn More