pcs Bicycle Trailer Coupler Bicycle Trailer Hitch Connector Kit for Child Pet

Material: The bicycle trailer hitch coupler attachment is made of steel with a black enamel coating, sturdy iron, strong and durable, corrosion-resistant, and difficult to damage. Size: The couplers are of the integrated type. The integrated attachment part: the shaft diameter is 0.58 inches, the hole diameter is 0.27 inches, and the length is 0.76 inches. The bicycle part connection: the mounting hole diameter is 0.4 inches, and the screw nut diameter is 0.87 inches. Each bicycle trailer hitch is equipped with a connecting pin; the pins are difficult to open, and once installed, they won't easily fall off, ensuring the safety of your children. The set includes two bicycle trailer couplers. With this additional trailer coupler accessory, mom and dad's bicycles can be connected to child trailers. As a bonus, when your children get tired of riding, you can attach it to the side of your bike.