Every curtain track requires curtain end stops, which are supplied in all manners of materials and designs specific to individual curtain tracks. This small device which fits to the end of the curtain track prevents the curtain gliders and curtains from sliding off the end of the curtain track. In some instances, end stops can be fitted not just on the end of a curtain track but positioned at any point along the rail, enabling you to fit multiple pairs of curtains over individual windows beneath the curtain track.