They claim 3/32". It'll do it but not very good. I've found 1/8" to
be the practical smallest size to get a good edge.
To contradict Pete C's comment, I've recently bought one and have
sharpened approximately 300 bits with it. I spot tested many bits by
drilling into a steel plate before & after sharpening, and I think the
DD does a darn good job of sharpening bits. Maybe not like a pro could
do with professional equipment, but very good for a DIY person. And a
hell of a lot better than having a drawer full of dull bits like I
I bought one to lazy to go look what model it is Cost about $100. If you
haven't bought one yet Don't expect to much scale of one to ten about a 6.
But like me if you have a lot of old bits laying because just can't throw
them away you will get a couple hours of fun sharpening them.
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