A Double End Pulley is a type of pulley system used for opening and closing curtains. The pulley is designed with two ends, which allows the cord or rope that controls the curtains to be attached at both ends. The use of a double-end pulley provides added control and stability to the curtains, ensuring that they open and close smoothly and consistently. the pulley is spring-loaded, meaning that it contains a spring mechanism that provides tension to the cord or rope that controls the curtains. The spring-loading ensures that the curtains remain in place, even when they are not being moved, and prevents them from sagging or drooping. When the cord is pulled, the spring-loaded pulley helps guide the curtains smoothly and evenly along the track, allowing for easy and efficient opening and closing. Spring-loaded floor pulleys for curtains are commonly used in stage and theater applications, where curtains need to be opened and closed quickly and reliably. They are also suitable for residential use, providing a convenient and functional solution for controlling curtains. Supplied by TSA. Suitable for Medium & Heavy Duty Tracks & Curtains.