1. 【3 Kinds of Degree: This valve extension set has 3 kinds of angles, namely 45 °, 90 ° and 135 °, and they are all equipped with rubber gaskets to ensure air tightness 2. 【Universal use】 This tire extender fits all passenger cars, trucks, motorcycles, trailers, RVs and RVs with standard tire valves 3. 【Convenient】 Allows easy access for tire maintenance. The adapter screws onto your tire valve, making it easy to check and inflate your twin tires. Longer life of the original tire valve screw. 4. 【Quality and durability: Made of copper, nickel plated on the surface, very strong, does not show rust or erosion, thus providing a long service life 5. 【Easy to install】 Built-in core allows inflation and deflation. You have just removed the existing valve cap and the screw-on adapter. The bottom of the extension spins freely for easy installation.