Containing the RescueTECH Spin-Lock Double Pulley, this rescue set provides a free-running 3:1 Block and tackle that does double duty as a friction lowering. device. The Spin-Lock Pulley works as a capstain lowering device that provides friction while lowering the firefighter. Proper safety precautions, such as separate brakes or rope grabs are to be used when in both raise and lower modes. Sling attaches around ladder beams or to suitable rigging point above victim. Packaged ready-to-use in RescueTECH Rigging Bucket. All of our kits are made with the most current model of the components. As such, many kits are made-to-order and may require a couple of days to assemble.