Petzl_Croll
Petzl Croll
Device used in rock climbing
A Petzl Croll is an ascending device[1] used in caving and industrial rope access made by the French company Petzl. Its name comes from the town Crolles where Petzl's company headquarters are located but might also be a reference to the nearby cave system of the Dent de Crolles, the exploration of which triggered a lot of technical effort leading to innovation in caving equipment.