We are using it for cutting lines to Synagenia.
Since making is solid, there is nothing like spreading legs while drawing a circle.
Since we are using a sharp core, it is convenient not to make the line thick.
Since the line is thick and precision can not be obtained with a pencil, the 0.5 mm core is quite nice. You can save time and effort each time. Sometimes it spreads out and the dimensions shift, so personally it was better to be a little harder. Although it may not be a problem when writing on ordinary paper.