High Quality Material: Our bike training wheels are made of high quality alloy steel and rubber with durable metal clamps, which are anti-slip and wear-resistant. Improve your child's safety and confidence without worrying about the back of the saddle. Damped and Sturdy: The training wheels are built with a structural reinforcement design that makes them sturdy for a longer product life. This set of heavy-duty rear wheel stabilizers helps young learner riders ride a bike until they develop a usable sense of balance on the bike. Improves your child's safety and confidence. Lightweight, quiet, intermittent wheel to protect the child from noise. Adjustable Size: The training wheels are suitable for 12-20 inch bikes and can be adjusted according to the child's ability and level of cycling. The training wheels are individually strong and adjustable, providing the safety and stability needed for cycling. Easy to assemble: The stand is made by multi-layer baking varnish process, the surface is smooth, burr-free, and you won't hurt your hands when assembling. All assembly parts and installation instructions are included, and you have more options to adjust the height. The training wheels can be used for a longer period of time and are perfect for children on bicycles. Worry-free shopping: We strive to provide the best customer service to every customer to ensure that you have a happy shopping experience. If you have any questions about the product you received, you can contact our customer service at any time. We will respond within 24 hours to provide you with a comprehensive after-sales experience.