The V-shaped friction channels: - give greater braking power on thin ropes - adapt the braking power on larger diameter ropes - increase the braking pressure on the ropes in Reverso mode
- effective braking on half and twin ropes (7.5 mm or greater diameter) - effective braking on single ropes (8.9 mm or greater diameter)
The asymmetric side grooves: - increase the braking power for leader or top-rope falls, or while rappelling - improve rope glide through device when taking up slack
- can belay the leader, one or two seconds and can be used for rappelling
The Petzl Reverso 4 is an ultra-light (59 g) multi-purpose belay/rappel device that regulates the amount of braking friction on the rope according to its diameter and condition.