Wire Lock is used to fasten poly film and/or shade cloth to your greenhouse. Its aluminum base channel is 6 ft. long, and does not rot. This is a great, easy way to attach plastic, that lasts for years.
Made out of aluminum and galvanized steel, the wire fits into the base, which is attached to the first and last bows with self-tapping screws, as well as along the greenhouse base. Screws not included. This can hold both the film and shade cloth in place.