HIGH QUALITY - The heavy duty steel and iron bicycle trailer hitch attachment with black enamel coating, corrosion resistant, not easy to damage. EASY TO USE - The bicycle trailer hitch designed for towing solutions and easy to install. Installation requires removing the nut from the bolts on the rear wheel and attaches to the rear axle of the bike with the axle nut back. ENSURE SAFETY - The bicycle trailer coupler is equipped with a connecting pin, the pins can hardly be opened, also once you install them, they will not fall off easily and can keep your baby safe . that you can easily and quickly enjoy a wonderful outdoor ride. QUICK CHANGE - Reduce the time it takes to easily switch from trailer to new bike. It can be replaced quickly by simply connecting the hook of the trailer. Widely Used - Bicycle trailer couplings are suitable for most bicycles, dog trailers, strollers, trailers, etc.