Manufactured with iron material and adopt precision welding technology, can bear heavy load, not easy to damage., it is strong and durable. The bike trailer coupler is easy to install, and won't take you too much time. Perfect for towing the trailers, riding your kids and pet around and towing some items.Features-Color:Black-Material:Iron-Size:8.30X5.50X2.86cm/3.26X2.16X1.12in-Made of sturdy iron materials, not easy to deform and age, durable in use and has long service life.-With this attachment, parents' bikes can be connected to the trailers, very convenient and practical.-The workmanship of this product is perfect, and you will have a good experience in using it.-Not easily fall off, can ensure your baby's safety. Suitable for children's trailers and most bikes.-Perfect for pulling the trailer, riding your kids and pets around and towing the goods.The bike hook attachment is of good workmanship and easy to use, making it ideal for most bikes.Packing list2 x Bike Trailer Hitches with Buckles