High-quality material: Bike trailer hitch is made of 5mm thick carbon steel with one-piece molding process. There is no welding as a whole, and it is durable, rust-resistant and non-deformable. Universal design: The axle hole diameter of the bike trailer hitch is 12.2mm. Can be used on most bikes and works with most child trailers, pet trailers and grocery trailers. Suitable for QR axles and solid axles up to 12.2mm (OD0.48in). Easy to install: The bike hitch is easy to install. First connect the bike trailer hitch to the bike with a nut, make sure it does not rotate when tightening. Then pass the Allen key through the pin hole and fix it in place while tightening. Must tighten it for safe use. Safe and flexible: The bike hitch is not easy to open and will not loosen by itself. To ensure safety during riding. Whether your bike is riding on a flat or bumpy road, the trailer will not wobble or overturn easily. What you get: 2 x Bike Trailer Hitch, 2 x Connecting Pins. You can easily attach a child trailer or pet trailer to your bike. This bike trailer hitch is compatible with bike trailers, Trixie, Hamax, Blue Bird, Karlie, Kranich, Leopet, Duraxx, VidaXL, Prophete and more. Name: Bike Trailer Hitch Color: Black Material: Carbon Steel Dimensions: 74.5 x 46 x 34 mm Thickness: 5 mm Installation opening: 12.2 mm Function: Connect the trailer to the bike stably. Feature: The bike trailer hitch is made of 5mm carbon steel, one-piece molding process. The structure is stable, rust-resistant, non-deformable, strong and durable. Widely compatible with quick release shafts and solid shafts less than 12.2mm, suitable for bicycles, mountain bikes and electric bicycles. Equipped with connecting pins, it can connect baby trailers, pet trailers and grocery trailers to bicycles more quickly. Simply attach the bicycle trailer hitch to the rear axle of the bicycle to attach the trailer. Bicycle hitches are not easy to open and will not loosen by themselves. To ensure safety while riding. Whether your bike is riding on a flat or bumpy road, the trailer will not wobble or tip over easily. This bike trailer hitch is compatible with bike trailers, Trixie, Hamax, Blue Bird, Karlie, Kranich, Leopet, Duraxx, VidaXL, Prophete and more. Suitable for Qeridoo bike trailer hitch from 2017, applicable models: Speedkid1&2, Sportrex1&2, Kidgoo1&2. Package includes: 2 x Bike Trailer Hitch 2 x Connecting Pins