●Specially designed for Thule trailers: the Nicedack trailer coupling is suitable for all Thule Chariot and Thule Coaster trailers. It can be easily and quickly mounted on your bike with a quick release. The diameter of the axle hole is 10.5 mm. ●Quality assurance: the trailer hitch is made of high-quality austenitic stainless steel. No need to worry about rust. ●Reliable design: the trailer hitch has added strip thread on the inside and outside of the screw hole, which makes the installation more stable, not easy to loosen and increases safety. ●Safe and flexible: the towing hitch adapts perfectly to the towing hitch with high flexibility. Whether your bike is riding on a flat road or a rough mountain road, the trailer will not easily wobble or knock over. ●【Service and Support】We strive to provide every customer with a satisfied product. Please do not hesitate to contact us if you have any questions about this coupling. You can get your money back if its not what you want.