Attach these to your ULTRA Air tools and your compressed air hose and gain levels of maneuverability previously only available in your imagination. This swivel allows you to blow compressed air into hard-to-reach paces and at different angles to maximize the dirt-lifting power of compressed air. The fittings are made of aluminum and come with thread sealant already applied. The pack comes with rubber O-rings to use when attaching any size fitting to the female end. This swivel works with any air tool and NPT fitting of any size. So it works anywhere in the world where compressed air is needed.