In order to connect a cover to an existing roller you will need to purchase a cover to roller strap set. This pack is completely universal & will connect to all swimming pool rollers/reels. They come complete with 10 straps, press fix connectors & a variety of universal fittings for the reel side. These include reel thumb screws, inner wedges & outer wedges which will connect to the much desired slidelock swimming pool roller & reel easy reel system. In addition it is supplied with self tap in screws which will also secure the strap set to other reel systems.