A compact and lightweight pulley with movable flanges and a large connection point that accommodates two carabiners. Prusik minding, the self-locking knot can be installed on both sides. Sealed ball bearings for high effiiency and intensive use at high speed. Effiiency: 92%. Aluminum alloy body and wheel, stainless steel axle. Ropes up to 13 mm Maximum Breaking Load: 25 kN Working Load Limit: 6 kN Width: 61 mm Length: 78 mm Thickness: 29 mm Weight: 90 g Sealed Ball Bearings Recommended for : Rope Access, Arborists, Team Rescue