Hunter Douglas Cord Tensioner is used for all continuous cords (circular cords only) operating systems. Comes with two different mounting options for inside mounted or outside mounted shades. This cord tensioner cannot be used with a beaded chain that has a bulky cord connector. This cord tensioner can be used for any manufacture that has a circular cord (Not beaded plastic chain) that you want to secure to the wall for child safety protection. In fact, this cord tensioner has to be secured to the wall or it will not work properly. Any circular cord that is just freely hanging should be properly secured to the wall or inside the window sill so no child can play with the cord.