Product Description 【Wide Compatibility】This bike coupler is compatible with virtually all bikes and compatible with Schwinn and InStep brand trailers (e.g. all AA, AB, AC AD, AE, AG, AH, AI series). 【Excellent Material】This bicycle trailer connector is made of high-quality steel, processed by precise welding technology, with many excellent characteristics such as high strength, corrosion resistance, heat resistance, high security, etc., which can be used in a variety of complex environments. 【Connection Pin】This coupler is equipped with a coupling pin - a part that is used to determine the relative position between two parts (bike and towed vehicle). Its main functions include positioning, securing, transferring loads, reducing vibrations and shocks, etc. It is used to ensure the safety of your baby or pet. 【Easy Installation】This bike trailer coupler is easy to install, and you only need to remove one nut for connection operation when using it. After removing the nut, install the coupler, connecting pin and pull ring in order. Note: Please adjust the angle of the coupler according to the actual needs and requirements to ensure that they work properly. 【Precautionary】This metal trailer coupler size and other parameter information has been marked as shown in the picture, in order not to affect your experience, please make sure the model of your trailer and the size of the additional hole before placing an order.