petzl - caritool, tool holder for harness petzl increase your gear carrying options with the caritool. a great accessory for mountaineering, ice climbing and long routes, it allows quick access and organization of ice screws, pitons, nuts... will also allow for quick storage/holstering of ice tools. compatible with the slots on most petzl harnesses and also attaches to the webbing waist belts of other harnesses.