
I've been looking for this chuck for a long time and couldn't decide. Then I bought a digital tire pressure gauge with cartridges from this brand. It slides up and down the valve stem without losing air. Then I bought 2 packs of this cartridge. I installed one on a tire pressure gauge which I really liked and it works great with no air leakage when placed on or off the valve stem. The cartridge is well made and of the highest quality. Someone said they fell apart, I don't understand how that could have happened. All brass parts are screwed together with high quality. The enlarged picture of the assembly shows how it is constructed. I read the negative review but based on the experience I had with the tire inflator I bought I bought these cartridges. There are several different brands of this cartridge but I don't think any of them will be better than this one. Brand!