Safari Swings 2 Heavy Duty Iron Swing Hangers for Wooden Sets | Includes 2 Snap Hooks. for Connecting to a 4"x6" Beam/Lumber For connecting to a 4"x6" beam/lumber Sold as a pair (2 swing hangers and 2 snap hooks) Constructed of heavy duty ductile iron. Galvanized Mounts easily to wooden swing sets Swing Hanger is designed to fit a kiln-dried 4" x 6" with a true measurement of 3-1/2" x 5-1/2", as the bracket opening measures 3-5/8" x 5-5/8". We suggest measuring your lumber before purchasing to ensure it meets those specifications