An ultra light multi-purpose belay/rappel tool the Petzl Reverso 3 Belay Device provides a wide range of friction that manages variable rope sizes and uses. Lightweight and easy to use the asymmetric V-shaped grooved friction channels regulate the amount of braking friction on the rope according to its diameter and conditions. The Reverso 3 provides effective braking on half and twin ropes to 7.5 mm and effective braking on single ropes to 8.9 mm. To enhance team logistics this device can belay the leader one or two seconding climbers independent and simultaneous belaying of one or two seconding climbers and can be used for rappelling. This tool also allows for quick change-over from Reverso mode to belaying the leader when climbing multi-pitch routes.