Backup device for abseiling. Mechanical prusik knot for abseiling and climbing. PETZL SHUNT suit both twin and single rope and replace friction knots such as the prusik knot.
Do you have a long ladder up to your tree house or zipline? Going solo climbing on a top rope? Petzl shunt can be mounted on a rope along the ladder / route and serve as a backup security device.
SHUNT is not designed to absorb the force of falls, and must not be used to self-belay