The Double Station Retractor is an ideal way to tone key shoulder and upper back muscles for superior posture and back pain prevention. Its two-person design is great for collaboration and works well in populated areas since there's no need to wait for someone to finish before using it. The machine's opposite facing design eliminates uncomfortable, workout-interrupting awkwardness. Push/pull chains provide great resistance with comfortable, ergonomic handle padding, and it's designed to be used by people thirteen and over. Its industrial grade material meets national safety standards and is durable even in outdoor conditions and with regular use, all while never needing maintenance. It's the perfect choice for parks, gyms and HOAs.