Grivel?s Master is as light as a feather! This belay device is based on the tube principle and, thanks to hole-shaped material savings, a true flyweight. These material savings prevent the tuber from overheating when you?re lowering your climbing partner. Moreover, they make the device easy to clean from snow, ice and dirt. The V-shaped notches create friction, relieve your fingers when stopping the rope and give you control over the rope at all times. Due to its minimalistic design, the Master is most suitable for single-pitch sport and indoor climbing. The next project is already waiting for you!