Carry the lightweight, efficient Petzl Micro Traxion pulley on adventures that can require crevasse rescue, gear hauling and self-rescue. Built-in cam acts as a progress capture device and is ideal for setting up hauling systems cam works on dirty or icy ropes, and can be locked open for use a standard pulley. Sealed ball bearings give the pulley 91 efficiency. Petzl Micro Traxion pulley works with climbing ropes from 8 - 11mm in diameter. Breaking strength as a pulley only is rated at 15kN breaking strength as a self-jamming pulley is rated at 2.5kN.