The ones I have, have an anti theft system, which is basically an outside housing around the sensor. The outside housing will spin by hand without unscrewing the sensor from the tire's valve. It came with a special wrench to allow unscrewing them from the tire. It's not perfect, but is easy enough to use and will keep an honest man honest.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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