A high strength multifunctional double pulley for block-and-tackle systems and complex operations. Features large wheels, a main attachment hole that accommodates three carabiners with two secondary holes on the sides, and a large becket. Prusik minding, the self-locking knot can be installed on both sides of both wheels. Sealed ball bearings for high efficiency and intensive use at high speed. For ropes up to 16 mm Efficiency: 97% Aluminum alloy body and wheels, stainless steel axle Maximum Breaking Load: 42 kN Working Load Limit: 12 kN Width: 100 mm Length: 147 mm Thickness: 54 mm Weight: 425 g Sealed Ball Bearings Recommended for : Rope Access, Arborists, Team Rescue