1. Easy to use: our bike trailer coupler is easy to install with no other tools needed; Firstly, fix the bicycle trailer hitch on your bicycle with a screw nut; Then insert the trailer accessory; Finally put the pin; The connection is complete, bring you much convenience. 2.Durable material: the bicycle trailer hitch hitch made of steel with black enamel coating, strong and durable, corrosion resistant, hard to damage. 3.Stable: Each bicycle trailer hitch is equipped with a connecting pin, the pins can hardly open 4.Application: a bike trailer hitch coupler can connect your trailer to your bike; With the bike trailer hitch, the trailers are easy to attach to your bike while allowing you to transport your small children safely and comfortably; It is suitable for universal bicycles, strollers, etc., they are convenient to carry, and you can use them at any time Material: The bicycle trailer hitch coupler clip made of steel with black enamel coating, made of sturdy iron, strong and durable, corrosion resistant, not easy to damage. Each bicycle trailer hitch is equipped with a connection pin, the pins can hardly be opened, also once you install them, they will not fall off easily, can ensure your babies& 39; safety. The set includes 1 sets of bike trailer couplers, with this extra trailer coupler accessory, mom and dad& 39;s bikes can be connected to child trailers. A bonus, when your kids are tired of riding, you can attach it next to your bike. Color: Black Size: as shown Quantity Sold: 1 set About chromatic aberration The goods sold are all taken in kind, but due to different lighting, monitors, etc., there will be a little color difference, which is a normal phenomenon, not a quality problem About the size The dimensions of the products sold are all measured manually. Due to different measurement methods and tools, there may be an error of 1-2mm, which is normal