- Appearance; material quality; weight; collet mechanism - reliable, convenient, because the length of the stylus can be quickly selected to suit your preferences; It is convenient that the sharpener is always at hand. The thickness of the stylus is 2 mm - a universal format, the golden mean. With proper skill and without sharpening, you can catch thin edges for thin lines, use the wide planes of the stylus for smooth shading.
- With constant work, the grip (handle) slips, you have to wipe it regularly. In this, all classic koh-i-noor pencils lose out to pencils with notches on the grip section. With heavy use, the design of the pencil can unwind. And when you draw / write / draw something intensively, a low-quality tool is the last thing you want to be distracted by.