Thinking
I used oil. What I needed was to not be stupid and buy a tool from HF.
A $4!T blade is a $4!T blade, no matter now much oil you put on it. In my experience, the HF hole saws are softer metal than they should be.
They are barely suitable for wood. In fact, I'd bet if you went through a 2X6, it would burn its way through by the end. Smellin' like a camp fire.











