VERSO is Petzl's lightest belay device. It accommodates most rope diameters: single ropes 8.5 to 11 mm, half ropes 7.1 to 9.2 mm and twin ropes 6.9 to 9.2 mm. It is intuitive and easy to use in the gym or at the crag; well suited for learning how to belay. The specific design of the rope slots allows the rope to glide smoothly and reduces wear.