CAMP Safety JANUS PRO High Strength Multifunctional Prusik Double Pulley 2161A 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. Becket MBL 21 kN WLL 4 kN