PETZL Pro Traxion Pulley 2" high 4" wide INTENDED USE: The PRO TRAXION loss-resistant progress capture pulley was designed to allow rope installation while the pulley is connected to the anchor. CONSTRUCTION: The large diameter sheave (38 mm), sealed ball bearings, and locking side plates allow this pulley to haul heavy loads. As a progress capture pulley, it has a working load of 2.5 kN and a breaking strength of 4 kN. VERSATILE: The lower connection point allows for different types of hauling systems. It can also be used as simple pulley by locking the cam in the raised position. ALL CONDITIONS: The toothed cam with self-cleaning slot optimizes performance under any conditions, from frozen to dirty ropes. DETAILS: The PRO TRAXION pulley weighs 265 grams. It's compatible with rope diameters of 8 to 13 mm. It's made of aluminum, stainless steel, and nylon.