The Petzl Shunt is a practical back-up rope clamp which can be used below the rappel device to replace self-jamming knots like the Prusik. Easy to install on the rope, the Shunt combines a durable aluminium frame with a smooth clamping action to increase durability and prevent damage on the rope.Easy to install back-up rope clampWorks on 10-11mm single and 8-11mm double ropesSmooth clamping actionMay be used to ascend single or doubled ropeHardwearing aluminium frameWeight: 188g