Even if you have never heard of tritium before, odds are you have already experienced it. The radioactive material is used in compasses, gun sights, watches and other items you might need to use at night.
The real advantage to tritium is that it works without a power source.
The tiny piece used in this keychain will glow for about 10 years, and will ensure you will never lose your keys if you drop them in the woods in the middle of the night.
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