He takes a sheet of regular printer paper, draws a circle on it the same diameter as his regular blades, and cuts it ... of tearing through paper and cutting through wood at a reasonable clip.

When cutting wood for a project while outside your workshop, a handy powered circular saw can go through many kinds of wood.

Circular Saw Blade Market size is expected to be worth around USD 17.4 Billion by 2033, From USD 11.2 Billion by 2023, growing at a CAGR of 4.50%.

A new circular saw blade might cost you 10 bucks or so ... the tips of the carbide might provide some minor improvement in cutting, without a diamond surface you won't even be doing that.