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. For ropes up to 16 mm. Prusik minding, the self-locking knot can be installed on both sides and both wheels. Sealed ball bearings for high efficiency and intensive use at high speed. Efficiency: 97%. Aluminum alloy body and wheels, stainless steel axle.