Looks good, no manufacturing defects and I brought the crescent key. BUT the threads on it are too deep for modern Mazdas. I'm not sure what year they were changed, but modern Mazda TPMS valve stems only have a few millimeters of threads, and they have too many, allowing the cap to fit over the threads without landing on the rubber seal, causing them can let air through. EDIT: I solved both problems, potential leaks and the possibility of jamming, by wrapping the tire threads in teflon tape, just like installing a shower head or other plumbing hardware. Keeps metal-to-metal contact, holds up better, and retains air better.
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