Quick Slide Fittings worked directly and only with the Quick Slide Handrail. The fittings are specifically designed to lock into the Quick Slide channel. It is recommended they be held in place with either a silicone or epoxy. End plugs are used to cover and seal any open end of handrail. The couplers are designed to fit between two straight handrail lengths, and sit over top a post bracket. A Quick Slide coupler helps keep a strong connection and a soft seam.