Ally redirect pulley with swing cheeks for use with the RopeGuide TwinLine made by ART. It can be useful in many different other climbing situations as well. It is connected with 6 to 8 mm shackles and is suited for ropes up to 14 mm. Minimum breaking strength is 6kN. The bearing is made of polyoxymethylene. This material is very sturdy with low friction. That s why the Ally bearing runs very smooth without grease on an aluminium axis.