Material: High Quality 316 Stainless Steel, Corrosion-resistant and Durable Performance: Adjustable turnbuckle, perfect for shade sails of different sizes. Our shade sail hardware kits make shade sail installation simpler and easier, keep your sail stable in the wind Application: Suitable for triangle, square and rectangle shade sail installation. You can install shade sail between trees, walls, poles or anywhere you want Package Contents: Pad Eye, Snap Hook, Turnbuckle, Screw, Plastic Expansion