Should a 5/8" hole saw drill a 5/8" hole? Not with this article! The pilot drill is not concentric with the outer saw. If you look closely at the photo you can see that the center pilot drill is 3/32 inch off center. So he drills a 13/16 hole in hardwood - too big for a 5/8 dowel. No trial and error. I got it right, I had to buy another hole saw from a different manufacturer to solve this problem.