About this item Premium Materials: Made with thickened 201 stainless steel and 304 stainless steel screws. Coated with high-temperature sand powder for waterproof, rustproof, and corrosion-resistant durability. Innovative Design: The Swing Set Bracket is one piece design with welded seems for the strongest and safest construction. Universal Fit: Designed for 4'x6' (actual 5.5'x3.5') top woods beam and four kiln-dried 4'x4' (actual 3.5'x3.5') side support legs. Easy Installation: Secure the swing brackets to the 4x6 top beam first. Then simply slide the 4x4 legs into the bracket with the beam flat on the ground (top down). Pre-drill holes for the lag screws and tighten them. Additionally, you can add a 2x4 crossbeam to the legs for added stability. SET INCLUDED: Screws/Bolts/Washers made of 304 stainless steel, Expansion bolts made of zinc-plated. 2 A Frame Swing Bracket;36 hexagonal screws (Φ1/4'xL1.57'); 36 screw washers (Φ5/8'); 1 drill (Φ3/16'); 1 drill sockets (Φ3/8');If you have any questions, please feel free to contact us!