The metal swing sets accessories include aluminum compression clamping yokes, galvanized ductile iron swing hangers with oil impregnated bearings, and rust resistant galvanized straight coil chains. These metal adult swing set are strong enough to hold adults. If cared properly and protected from rusting, metal swing sets can last for a long time. Use lighter color paints in order to offer a cooler touch, as lighter paint tones absorb less sunlight. Metal swing seats can cause injury so it is better to use plastic or rubber seats.