Solid and Durable: Made of copper, very durable, not easy to rust or corrode, it can ensure a long service life Easy to Use: The built-in magnetic core can be inflated and deflated. You just need to remove the existing valve cap and tighten the adapter. The bottom surface of the extension can be rotated freely for easy installation General Accessories: These tire extension rods are suitable for all cars, trucks, motorcycles, trailers and recreational vehicles with standard tire valves Corner Design: The problem that the pedal pump cannot be used to check tire pressure or pump tires due to the lack of space between the valve and the spokes has been solved Double sealing: The American valve has a built-in sealing ring, which has strong sealing. The pure copper material has high strength and is not easy to age, and the performance is more stable