His is the flat edge of a Bic disposable. (The cutting edge is the white line in the middle, the darker section to the white line's right is the upward slope towards flat, unground steel.) You can see that it's manufactured very cleanly, with a relatively clean edge with few nicks or ridges.
The legend shows 100 microns—for reference, a human facial hair is somewhere between 50 and 150 microns thick, depending on your particular genetics. So on average, our 100-micron legend is a good stand-in for the thickness of a human hair. There's little doubt that this cheap Bic will be able to get through at least one hair without issue.