Portable Winch Co. Double Swing Side Self-locking Aluminum Pulley. 9,000 lbs. of mechanical advantage at a very advantageous price!
This Swing Side Pulley features a self-locking brake cam system that allows rope to go through freely in one direction, while blocking it in the other direction. The spring-loaded cam can be disengaged by simply pulling the release cord.
When used in a system with matching double pulley, it provides 4:1 mechanical advantage. Both 2 1/2" diameter Pulleys are mounted on self-lubricated bushings and stainless axles. The swing sides are also made of anodized aluminum.