These are junk, I don't mind that they're cheap and made from inferior materials, but they could at least use glue to hold them together. I ordered 2 of these and bought one at a local auto shop and at least one of each pack had already broken and then when screwed in the glue broke and the chromed plastic mandrel came loose from the threaded part. The ones I glued with Shoegoo are still on the valve stems, the ones that weren't broken when installed peeled off after about a week. They look good but are horribly designed. But a different brand