Summit Aluminum Railing is Gilpin Inc.'s highest grade railing product. Manufactured from high grade aluminum alloy. Summit comes fully assembled and ready to install using one of three installation methods (posts and fittings sold separately). Choose from three mounting options. For a straight rail, use either the installation spindle or a wall mount bracket. If an angle (horizontal or vertical) is needed, use the swivel fittings. Summit looks great using your current deck posts or 2 1/2 in posts.