Petzl's ever popular belay device with guide mode.

Changes over the Reverso 4 are mostly weight saving as this plate is now only 57g!

There are teeth on the dead rope side that allow for excellent braking.

Rope Combatibility:

Single Rope: 8.5-10.5mm (Petzl say this may work on ropes up to 11mm depending on how supple it is)

Half Ropes: 7.1-9.2mm

Twin Ropes: 6.9-9.2mm