As good as Starrett tools usually are, and expensive as they are, I expected more from this stock. I have similar holders from Milwaukee, Bosch, and Diablo, but I bought this Starrett because it came with a carbide center drill that I could just leave in the box with my diamond core bits. This particular pavilion, as designed, is virtually useless. It was stiff right out of the box so I oiled it and shook it back and forth a few times to loosen it up. If it's a hole saw (also made by Starrett),