OZCO Ornamental Wood Ties (OWT) 4 in. Rafter Clips Ironwood are manufactured with pre-galvanized steel and finished with a black powder coating offering superior corrosion resistance and ultimate strength. OWT Rafter Clips are ready to be seen and used on a variety of different projects from arbor elements to fencing, rafters to the railing. While all of our OWT Building Products are designed for exterior projects they are #OWTstanding for interior design, from architecture to furnishings. Unlike conventional wood post bases, brackets and connectors OZCO’s OWT line of products does not require additional labor and materials to conceal them, saving time and money.