Designed for Adult, It is important to have strong shoulders that are also flexible. Having strong shoulder muscles can help to prevent rotator cuff tears. The Royal Double Station Shoulder Rotation is a great way to strengthen your shoulder muscles. This piece of fitness equipment is part of the royal fitness series, and it is will be an illustrious addition to your outdoor fitness area. Up to two people can use this at once, so you will be able to get in shape with your king - or queen - by your side. The frame is made from a galvanized steel tube and comes with stainless steel hardware. It is manufactured to have no sharp edges. The Royal Double Station Shoulder Rotation is made from commercial grade material, and it has a tough powder coated finish to give it maximum durability. This will ensure that it will last for many years of outdoor use.