Description Features: 1.Replacement coupler for child trailers and most bicycles 2.It can be used as a convenient and safe hook to connect the bicycle trailer to the rear axle of the bicycle. 3.A heavy-duty steel, welded boom with an angle of approximately 45 degrees, suitable for many types of bicycle trailers. 4.Lightweight and compact size design, easy to carry and storage. 5.amily fun: With an additional trailer coupler attachment, both Mom and Dads bikes can be outfitted to tow the kids trailer, your kids will enjoy the bike ride. A bonus, when your kids gets tired from riding, you can strap him next to your bike Notice: Please allow 1-3cm deviation due to manual measurement Actual color may be slightly different from the image due to different monitor and light effect Description: Material:Metal Size:as shown includes: 1x Bike Bicycle Trailer Coupler with Buckle