If you asked me about the angle of the bevel on my tools I wouldn't be able to give an exact answer.
Most of the time if a blade needs to be set up to regrind the bevel the tool that came from Lee Valley to measure bevel angles in five degree increments is sufficient.
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But now for those who feel knowing to the closest gnats eye lash measurement of angle, this new device is available for a limited time:
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http://www.woodpeck.com/ottanglegaug...&rid=237522995
Sometimes there are too many tools to buy.
jtk