Robert Axle Project 12x142 1.75mm Thread for Hitch Mount Trailer For use with hitch mount style trailers common with child carriers such as Thulehariot, Burley, InStep, Croozer and more Stainless steel axle end provides an M10x1 threaded stud that accepts any hitch from popular trailers Trailer hitch is NOT included Customers will use hitch provided by trailer manufacturer Installed or removed using a 5mm Allen wrench