Back-up rope clamp Used below the rappel device, the SHUNT works as a rappel back-up and replaces self-jamming knots like the Prusik. Works on single and double ropes. Easy to install on the rope Smooth clamping surfaces won't damage rope May be used to ascend single or doubled rope. Designed for: - Multi-pitch climbing - Aid climbing Also good for: - Mountaineering Specifications: Weight: 188 g Material: aluminum frame For use on single ropes 10-11 mm or double ropes 8-11 mm 3-year guarantee CE EN 567/UIAA Item Number: B03