Croozer Designs Bicycle Trailer Hitch Axle-mounted bicycle hitch allows for Croozer bicycle trailer use on an additional bike without removal of initial hitch Compatible with both nut and quick release bicycle rear axles Durable welded metal construction with countersunk axle mounting hole for no-slip connection to axles Can be mounted in either a hanging, or front-to-back configuration Black powder coat finish and water drainage grooves for protection against rust and corrosion