The cleat cover box and halyard channel is your best option for security on and external halyard outdoor flagpole. Our lock boxes limit access to the cleat area on your flagpole and the halyard channel covers the halyard rope preventing it from being cut or tampered with.The cleat lock boxes are made of solid aluminum with a satin finish and are completely rust-proof. The lock boxes are available in small, medium and large sizes. The small box is recommended to be used with flagpoles that have a diameter of 5rdquo; and smaller and the medium cleat cover box is ideal for use with flagpole with a diameter between 5rdquo;-8rdquo;. The large cleat cover boxes are designed to be used with flagpoles with a diameter measuring 10rdquo; or more. Each lock box comes with the halyard channel which is able to accommodate all rope sizes and measures 5r’ in length.For any questions regarding the cleat cover box and halyard channel give us a call. Our dedicated experts are ready to any question you might have!