One of the biggest double prussic minding pulleys on the market. The ISC RP067 is a double-sheave, 70kN prussic minding pulley designed for real heavy-duty rigging, rescue and arborist hauling systems. The flat 'bottom' of the side plates facilitates easy use of a prussic to capture the load as it progresses. The becket allows for attachment of another leg of rope to give you a 5:1 mechanical advantage. Fully CE certified to the 2007 version of the pulley standard (EN1227B). These ISC pulleys are also NFPA compliant. Aluminum side plates with silicone impregnated bushings on the sheave for a very smooth, effortless action. Axles are riveted rather than bolted to comply with European standards. Tamperproof and almost impossible to unscrew during use. Compatible with all ISC steel rigging carabiners.