
Material quality is very good. Not sure what tolerances to expect as this is my first time buying a center drill bit set. I have used 3/8" and 1/2" hole punches to punch holes in coins and both are approximately .010 is not round. It's just under 1/64 of an inch. I know the shots need some play, but I'm still not sure if that's a good tolerance or not. I ended up sawing off half of the coin ring to keep everything straight.

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