Description 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 (base):6.00X5.00X3.00cm/2.36X1.97X1.18in -Size (buckle):5.00X5.00X4.00cm/1.97X1.97X1.57in -Exquisite workmanship, reasonable structure, professional and practical, easy to install and stability. -By removing or squeezing an easy-to-release nut or attaching the bike trailer coupler to the bike's rear wheel assembly. -The bike trailer hitch provides the critical connection from your trailer to your bike for quick rider changes. -Once you install them up, they will not easily fall off, which can ensure your babies safety. -It provides excellent stability and is compatible with a majority of bikes on the market. Exquisite workmanship, reasonable structure, professional and practical, easy to install and stability. By removing or squeezing an easy-to-release nut or attaching the bike trailer coupler to the bike's rear wheel assembly. The bike trailer hitch provides the critical connection from your trailer to your bike for quick rider changes. Once you install them up, they will not easily fall off, which can ensure your babies safety. It provides excellent stability and is compatible with a majority of bikes on the market.