Bluedot Trading New Heavy Duty Stainless Steel Sun Shade Sail Hardware Open-Frame Turnbuckle (hook to hook) Corrosion Resistant - 8 1/4" to 12" - Quantity 1. High Quality 316 Stainless Steel (marine grade stainless steel) offers good corrosion and rust resistance. Having the proper hardware makes installation so much easier compared to piecing it together yourself. Get ready for summer, fall, spring, or any time at all! You can hang shade sail with this installation kit in many places, such as the garden, backyard, patio, cafe, pavilion, deck, or parking lot to protect against the sun's harmful rays while you enjoy cool, pleasant, and beautiful outdoor leisure space for a peaceful relaxing time with your family and friends. Hook to Hook turnbuckle hardware for shade sail, strong rust-resistant body. Do not use for overhead lifting, support of human weight, athletic or playground equipment. Inspect frequently. This hardware kit can safely secure your shade sail to a variety of anchor points.