QUALITY MATERIAL: These wheels are extremely durable and heavy duty. Glide to the finish line with ease. AXLE HOLE. The 1/8-inch diameter axle fits perfectly inside the GT-FX wheel and extends through, making it a good choice for a shell dragster. DESIGNED FOR STYLE. Designed with style in mind, these GT-FX Wheels are flashy and cool and will make your car look and drive to perfection. MATERIALS FOR THE WHOLE CLASS. This pack comes in bulk with 100 wheels, allowing for several vehicle builds. VEHICLE BUILDING PROJECTS. Build model cars or dragsters using these GT-FX wheels. Teach STEM education while enjoying the thrill of making and racing vehicles.