This end stop is manufactured by Integra, it is formed from nylon which is injection moulded to get its unique one piece design. It slots in the end of the track, in the same channel as the gliders and is secured in place with a small metal screw. Its it is solely designed to be compatible with the discreet top fix and wall fix metal track. The function of this end stop is to prevent the curtain from sliding off the end of the track along with all the curtain runners. Also when the last outer curtain hook is hooked through the eyelet of the end stop, it prevents the curtain from running free along the track keeping the curtains neat and evenly spaced when drawn.