Item weight 190 grams Item dimensions LxWxH 4.72 x 3.94 x 1.18 inches Frame material Steel alloy About this item What you will get: Comes with 2 sets of bike trailer hitch coupler, each set includes 2 tools, sufficient for daily use or sharing with family or friends Universal Design: Our bike coupler hitch fits QR axles and solid axles up to 12.2 mm (0.5 inch), compatible with most children's bicycles and trailers; Note: Not compatible with Breezer style dropouts Sturdy and durable material: The bicycle trailer hitch is made of quality steel, sturdy and firm, not easily bent or deformed, with a slim structure for long-term durability Functional Tool: With this bike hitch attachment, you can connect a child's trailer or pet trailer to your bike, allowing you to ride together and enjoy outdoor activities Portable to carry: This compact bike coupler attachment is lightweight and easy to carry in a backpack; simply mount it on the rear axle of your bike for quick setup