High-quality sun protection fastening set: The sun sail fastening set is made of high-quality 304 stainless steel, is highly resilient, durable and robust. Perfect tension: The length of the tensioner is adjustable from 14.5 cm to 21 cm, the tension screws ensure optimal tension of your awning. Universal mounting set for awnings: This garden sail fastening set is ideal for mounting triangular, square and rectangular sail shades. All solid structures. Practical sail hardware set: The complete awning set contains everything you need to transport an awning, no need to buy additional nails or hooks. Fastening set contents: 4 turnbuckles, 4 wall brackets, 4 carabiners, 16 screws, 16 Plastic expansion tubes (roller blind is not included).