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TrewTungsten® Hard Metal is a
special type of Tungsten Carbide,
the world's hardest metallic substance.
Bands made of this high tech metal
will retain a polish longer than any
other metal; it measures between
8 and 9 on the Mohs hardness scale.
Sapphire; the hardest of the colored
gemstones is 9 on the Mohs scale.
Fine Swiss watch makers have
used a similar type of Tungsten
Carbide in their wristwatches for
nearly 40 years.
www.trewtungsten.com
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