Review on Dsycar 6 Pack Gold Metal Valve Stem Extenders - 45°, 90°, 135° - Universal Extensions for Car, Motorcycle, Bike, and Truck by Kyle Robinson

I bought these for RV interior tires. The tire shop didn't recommend using 45 degree rims because the tire could leak air when loosened. For the tire assembly, I therefore decided to use rigid 45-degree valve stems. They seem like a good product for the price but not for my purpose.