Easy to apply mechanical rope clamp to replace your prussik knots. Internal cam grabs the rope when the shunt is weighted. Excellent backup device to your descender; accepts double or single ropes on rappels. Requires understanding of rope systems for use; brakes when device is released. Must be used in tandem with a descending device. For use on single ropes 10 mm to 11 mm or double ropes 8 mm to 11 mm. CE and UIAA certified. Weighs 188 g.
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