Our Adjustable Glider Brackets can be used on any beam that measures between 3" and 4.5" wide. Great for any 4x4 or 4x6 beam! The adjustment allows each bracket to clamp down securely and on the top of your swing beam. Comes as a set of two brackets and provides a 4-point hanging system for your glider swing. Each end includes a built-in swing hanger with a nylon bushing. The hooks have a small opening to securely slip on most chain links, or you can use Quick Links or Spring Clip attachments.