Item Weight 190 Grams Item Dimensions LxWxH 4.72 x 3.94 x 1.18 inches Frame Material Alloy Steel About this item What you will get: comes with 2 sets bicycle trailer hitch coupler, each set accounts for 2 tools, enough to meet your daily needs or share with family or friends Universal design: our bike coupler attachment is suitable for QR axles and solid axles up to 12.2 mm/ 0.5 inch, proper for most bicycles and children trailers; Note: does not compatible with Breezer style dropouts Rugged and durable material: the bike trailer hitch is made of quality steel, which is sturdy and firm, not easy to deform or out of shape, with fine structure, durable for long time using Functional tool: with our bike coupler attachment, you can pick up your son or daughter as well as pets by bicycle and enjoy this fast interaction, and have a good time by riding together< /p> Portable to carry: this sturdy bike coupler attachment is not large, you can easily carry it in your bag for outdoor activities, connect your kids trailer with your bike, you can mount it on bike rear axle