Ultimate Safety for Your Kiddos. These durable, elegant swing hangers are the best solution for mounting your swings to your 4x4 play set swing beam. Each set includes two 4in swing hangers and easy-to-use mounting hardware - so your job is easy and hassle-free, even if this is your very first time. Whether you're attaching a swing to your brand new swing set, or you're replacing an old swing with something more innovative; our swing hangers are the perfect option. Designed to hold up to 120 lbs - ideal for youngsters embarking on tons of swinging play and adventure. This pair of swing hangers fit on 4x4 swing beams. Of course, you don't have to worry, because this design meets/exceeds ASTM safety standards for backyard residential use.