A close-up of a sharp chef's knife.

The video opens with a close-up of a chef's knife, then transitions to a straight razor. A digital scale is used to measure the sharpness of the razor, which registers 45. A sharpness chart is shown, indicating that a reading of 45 is 'razor sharp' and less than 0.1 microns thick. The chef's knife is then tested, registering 976, which is described as 'really dull'. The knife is then sharpened using a magnetic holder, a diamond sharpening disc, and finally a leather polishing strop. The sharpness is re-tested, showing a reading of 40.