Lightening fast wood removal with myriads of tiny, conically shaped, needle
like barbs of structured tungsten carbide. Use with flex shaft grinders,
mini-grinders, high speed grinders or drills. Burs can be cleaned with
a torch or oven-cleaner. We normally only stock silver burs. We get asked
for gold burs, slightly smoother cut, but we find that the difference
between the gold and silver is not enough to make a difference.