High Quality MaterialsThe Bicycle Trailer Hitch Accessory Made Of Steel With Black Enamel Coating, Made From Sturdy Iron Material, Strong And Durable, Corrosion Resistant, Not Easy To Damage. Suitable Size If You Are Not An Ordinary Bicycle, Please Confirm That The Size Is Suitable And Then Purchase It. Shaft Diameter Is 0.58", Hole Diameter Is 0.27", Length Is 0.76". The Connection Of The Bicycle Part: The Diameter Of The Mounting Hole Is 0.4 In. Ensure SafetyEach Bicycle Trailer Hitch Is Equipped With A Connection Pin, The Pins Can Hardly Fit Together. Open, Also Once You Install Them, They Will Not Fall Off Easily And Can Ensure The Safety Of Your Babies. Easy To InstallFirstly, Fix The Bicycle Trailer Hitch On Your Bicycle With A Screw Nut; Then Insert The Trailer Attachment; Finally, Put The Pin; The Connection Is Complete, Bring You Much Convenience. Widely ApplicationYou Can Use It To Drag Strollers, Pet Carts, And Bring Children And Pets When Cycling In The Park, Which Is Very Convenient And Safe. NEW