[sammyg2]

Harbor freight sells blades for that saw, both fine and course. Lots of other places too, I found some on line. Search for bi-metal air saw blades.

BTW, I have all kinds of HF tools in my garage and I know tools. I made a good living with tools for many years and I'm a ME who spends at least $60k a year on tools at work.
I don't buy HF tools for my machinists but for home use they do just fine.

Those who automatically dismiss all HF tools as junk probably shouldn't.