Setting the coarseness using the grind adjustment nut. This is an inexpensive grinder, and I did not expect it would have a numerical dial indicating the recommended "number" for various methods...ie espresso/pour over etc.. but it would be helpful if Hairo provided a more specific guideline rather than the chart stating the recommended fineness ....coarse to fine...which is a very subjective measure. Fully closed (clockwise) is the finest setting. How many clicks or rotations counterclockwise from there are suggested for espresso. I did try the full clockwise (too fine) Then backed it off about 3 revolutions...too coarse. I finally managed an acceptable particle size, but in general the consistency at these various setting was poor. Consistency makes a big difference to the extraction and taste of your coffee. If taste is the most important criteria in your buying decision, I would suggest a more accurate/more expensive/higher end grinder...perhaps with titanium coated hardened stainless steel burrs.