The lightest in the Petzl range! VERSO is an easy-to-use belay device. With it, you can belay a climber or rappel. The specific design allows the rope to glide smoothly through the device and reduces wear. It is compatible with most rope diameters: single 8.5 to 10.5 mm, half 7.1 to 9.2 mm, and twin 6.9 to 9.2 mm.