The Double Pendulum Swing is designed to last long, built with commercial grade material that makes the equipment perfect for outdoor use at parks. It is meant to be used by individuals who are 13 years of age and up. You can secure the equipment with an in-ground or surface mount. The Double Pendulum Swing works to strengthen hip flexors. Hip flexors are important to do everyday things like walking, climbing stairs, or any action that requires movement of the hip. This piece of adult fitness equipment is double-sided, so it allows for to individuals to use it at once.