Grivel Master Belay Light and compact belay/rappel device. Built for multi-purpose use, the Grivel Master Belay Device can be used for both belaying and rappelling. The Master is a versatile, dynamic and reliable tool to minimize the force transmitted to the anchors, the belay and the wear and tear over time of the rope. To reduce the overall weight, the belay device features multiple holes plus, these holes allows heat to escape ensuring your rope never becomes too hot. Its body has been designed with a series of holes on the sides to reduce weight, but above all to disperse the heat and consequently not to overheat the rope that passes into it. Lastly, it can be used both on single pitch climbs, on a multipitch route, and on a classic wall where you don't want to stress the anchors.