OZCO Ornamental Wood Ties (OWT) Ironwood High-Velocity Rafter Clips 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 railing. High-Velocity Rafter Clips utilize industry-leading features and attachment techniques, making them truly a building breakthrough.