Extenders for Training Wheels are crafted from excellent stainless steel that is strong and stable. They are simple to attach and detach without any tools, and they are light in weight. They are suitable for baby pet bicycle trailers with a thread specification of 10mm. They are perfect for extending your bicycle and enhancing your riding comfort. Properties: Product name: Bike Extender Product material: stainless steel Product weight: 70 g Thread : about 10mm/0.39in Packing size: about 55*55*20mm/2.16*2.16*0.78in Packing list: 1*Extender for Training Wheel See more product details 1.Anti-Rust and Durable: Made of excellent stainless steel, the bike extender is resistant to rust. It can cope with various harsh environments, such as mud, sand, or snow. 2.No Tools Needed: The bike extender has a simple design that makes it a breeze to install. You only need to tighten the screws to the bike trailer connector and you are good to go. Saving you time and effort and lets you have fun with your trailer and your bike. 3.Easy to Carry and Store: The bike extender is small in size and light in weight, so you can easily put it in your portable bike bag or pocket, an awesome accessory for your bike. 4.Diverse Applications: You can bring your baby or pet with you on your cycling trips without hassle. Our extender works with various bicycle trailer connectors, so you don't have to worry about finding the right one. Just attach the extender and start your journey. 5.Precisly Match: The bike extender is an immaculate match for the 10mm thread specification of the bicycle trailer connector, providing a secure and stable connection that won't loosen or fall off. The bike extender is a great solution for adding training wheels or other accessories to your bike and provides a smooth and safe ride.