Review on Precision and Perfection: UCHIDA Le Pen Technical Drawing Pen Open Stock - 0.1mm Black by Heather Shaw

Great while they last as they draw flawless, razor-thin lines. Le Pen Technical also fits well and doesn't cause cramps in the fingers. My only complaint is that the ink runs out fairly quickly. And by fast I mean a drawing. Then the ink begins to slip, and you need to go along the drawn line twice or even three times (three times). The line then quickly becomes too large. It's too much hassle, but I'm not willing to constantly buy a pen that takes 3 days to ship every few days. My local Walgreens and Rite-Aid don't supply pens as fine and the cost is bound to go up. Overall this pen is excellent as long as it lasts.