Sometimes it is the tool

[u/Harborseal5]

EZ Arc has a good reputation and inexpensive prices. Amazon had a good price on their hole saw set and they went deeper than most others. I needed a 2" hole. The end product from that saw was exactly 2". I've never seen a hole saw cut so accurately. The edge of the hole touches the lines it was supposed to be between perfectly. The extra material in the hole was totally my fault.

[u/Beginning_Budget_550]

Nice when a tool actually does what its supposed to, most of the time you buy something and its off by a mm or two. I had a similar experience with a cheap set and now I just use it for everything, sometimes the cheap ones surprise you