The famous RSI Haul Safe pulleys. These are the
first and finest pulleys to include a spring-loaded cam to secure
the rope. Used for mechanical advantage, block and tackle, line
transfer, etc. Heavy duty Iife support one piece design exceeds all
applicable NFPA, OSHA, ANSI and CSA standards. Designed for 7/16”
rope but will accept 1/2” NFPA lines. Available In either single or
double sheave models for a wide variety of applications.