Item weight 190 gramsItem dimensions LxWxH 4.72 x 3.94 x 1.18 inchesFrame material Steel alloy< /p>About this item What you will get: Comes with 2 sets of bike trailer hitch coupler, each set is 2 tools, enough to meet your daily needs or share with your family or friendsUniversal Design: Our bike coupler clip is suitable for QR axles and solid axles up to 12.2 mm/ 0.5 inch, suitable for the most children's bikes and trailers; Note: Not compatible with Breezer style dropoutsSturdy and durable material: The bike trailer hitch is made of quality steel, which is sturdy and firm, not easy to bend or deform, with Fine structure, durable for long time useFunctional Tool: With our bike hitch attachment, you can take your son or daughter and pets on a bike and enjoy this quick interaction, and having a great time riding together&lt; /Portable to Carry: This sturdy bike coupler attachment is not large, you can easily carry it in your bag for outdoor activities, connect your child's trailer to your bicycle, you can mount it on the rear axle of the bicycle