The Kid Trailer Thru Axles allow users to attach a “hitch mount” style trailer, to any thru-axle equipped bike. Machined and tested in the USA, the Kid Trailer axles are designed for maximum strength and ease of use. FEATURES : For use with hitch mount style trailers common with child carriers such as Thule/Chariot, 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 Designed, built and quality tested in the USA Length: 167mm or 152mm with included tapered spacer Thread pitch: 1.0mm Compatible with Syntace 12 x 135 and 12 x 142 axles as well as other manufacturers with similar dimensions