PETZL Micro Traxion Ultralight Progress Capture Pulley INTENDED USE: The MICRO TRAXION is an ultralight, ultra-compact progress capture pulley that is designed for crevasse rescue, hauling, self-rescue, and as an emergency ascender. CONSTRUCTION: The sealed ball bearings provide excellent efficiency in a compact package. As a progress capture pulley, it has a working load of 2.5 kN and a breaking strength of 4 kN. VERSATILE: The cam can be locked in the open position so the device can be used as a simple pulley. It even works on frozen or muddy ropes. EASY TO USE: With the rope installation diagrams engraved right inside the pulley, setting up is a breeze. DETAILS: The MICRO TRAXION pulley weighs only 85 grams. It's compatible with rope diameters 8 to 11 mm.