I had a cheap hole saw from a big box. Firewood burned best after a few cuts. This frustrated and annoyed me as I was wasting my time and ignoring my best advice to get decent tools. So I ordered this for two day delivery, received it in one day and finished the job with absolute ease. I've since bought a few more Lenox hole saws of various sizes and they've all given great results. The speed slot also seems to make it easier to remove the connector from the blade. So far so good in terms ofβ¦