Petzl GriGri 2 - Climbing from LD Mountain Centre UK
Petzl MAESTRO L Descender with Integrated Progress Capture Pulley, CSS Worksafe
Petzl Reverso Review | Tested by GearLab
REVERSO®, Versatile, lightweight belay/rappel device, for use with one or two rope strands and ability to belay a second climber from the anchor - Petzl Other