1.Portable Easy to install: the tow bar has vertical and horizontal holes.Regardless of whether the holes in your bicycle coupling are vertical or horizontal,they work perfectly for you.^ 2.Family fun With an additional trailer hitch, both.Mommy"s as well as daddy"s bicycles can be equipped to pull the child trailer.your children will enjoy the bike tour. A bonus: if your kids get tired of driving,you can attach them next to your bike.^ 3.Material Steel that is strong and safe.^ 4.Compatible Bicycle mount for multi-compatible compartment, fits most bicycles. Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.