Per the Petzl Website:
This multi-purpose belay/rappel device is 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 condition.
A single device for all rope types:
*effective braking on half and twin ropes ¡Ý 7,5 mm
*effective braking on single ropes ¡Ý 8,9 mm
*can belay the leader, one or two seconding climbers and can be used for rappelling
*independent and simultaneous belaying of one or two seconding climbers in Reverso mode
*quick change-overs from Reverso mode to belaying the leader when climbing multi-pitch routes
V-shaped friction channels:
*increased friction on thin ropes
*friction is adapted for larger diameter ropes
*increased holding power in Reverso mode
Asymmetrically grooved sidewalls:
*increased braking power during a leader or top rope fall or while *rappelling
*rope smoothly slides through device when taking up slack
Carabiner hole to release device when loaded in Reverso mode:
*allows the loaded device in Reverso mode to be easily and gradually released with only a carabiner
*will not kink the ropes regardless of the mode used
*separates the two strands of rope when belaying and rappelling
*Reverso mode attachment point is easy to identify
*keeper cable keeps the device from moving up the rope when belaying and reduces chances of losing the device
*usage diagrams (standard belay and Reverso modes) engraved on device.
*For use on single ropes (¡Ý 8,9 mm), half and twin ropes (¡Ý 7,5 mm)
*Weight: 77 g
*Hot forged aluminum body
Available in 3 colors:
- green, D17 G
- blue, D17 B
- titanium, D17 T
So much nicer than the original Reverso and Reversino. The ability to utilize one device for the wider range of rope diameter's makes this the deal to get. Very effective in the Reverso mode and easy to release the pressure to free the rope and allow for continued use.
Overall, I love it and highly recommend it. Less bulkier than the BD ATC GUIDE and 30 grams lighter!