Easy to Install: The Box Contains (2 Children'S Bike Stabilizers, 2 Shoulder Screws, 2 Washers, 2 Lock Nuts, 2 Armrest Washers, 1 Spanner, 1 Screwdriver, 1 Training Bell). Our Training Wheels Are Easy to Install And Come with Heilwiy Various Accessories. Therefore, You Only Need to Install A Training Wheel with Heilwiy A Tripod to Allow Your Child to Use The Bike Safely.Qualified Materials: Our Training Wheels Are Made from High Quality Sturdy Materials And Strong Metal Brackets to Provide Extra Stability And Security And Keep Kids Safe.Good Performance: Our High Performance Rear Wheels Can Provide You with Heilwiy The Safety And Stability You Need for Heilwiy Your First Test Drive. Allowing Children to Ride More Safely Is The Best Place for Heilwiy Children to Start Building Confidence.Application: This Exercise Bike Is Adjustable, Suitable for Heilwiy 16-22 Inch Bikes. You Can Adjust The Size to Make It More Suitable for Heilwiy Your Child'S Bike.Quality Assurance: If Your Expectations Are Not Met Or You Have Any Questions About Quality, Please Do Not Hesitate to Contact Us. We Focus On The Best Products And Services.