The Plate Barbell Combo Holder is a innovative holder that mounts directly on the exterior of your All-In-One PLM03 Power Rack. Installation is quick and easy. This convenient combo holder is designed to securely store your favorite Olympic-sized bar and weight plates, ensuring both safety and convenience. This combo holder is heavy-duty, and help you to take up minimal space in your home gym. We recommend placing the plate barbell combo holder on the outside of your power rack.