Please check the dimensions of the cross-member you intend to attach the shackle to before ordering.(Fits on 3" x 3" Crossmember with 0.625" holes),The Shackle attaches to rig cross bars to fit various accessories and attachments.For example, for hanging ab slings,heavy bags,straps,chains,grip work suspension,Resistance Band etc.,It provides a simple, secure way to hang rings, ropes, gripping tools and a variety of other useful add-ons.,It can be used to customize your pulley system, cable system, and give you a powerful addition to your home gym.,It will be easier and more comfortable to use it for band work and stretching, leg curls, flying and other fitness exercises.