This is an excellent product if you want to make quality drawings. You get three pens each of different thickness. The 0.2mm is fine enough for most details and the 0.5mm chunky enough for baselines and outer lines on sections and elevations. In addition you also get a 0.5mm propelling pencil with leads. A black ink bottle is also supplied. What I particularly like is the lid! It doubles up as a template giving you circles, arrows and a protractor - nice touch! You also get an eraser (rubber) in case you make any mistakes!!!! Well worth it. I bought this product in 1995 (yes, a long time ago) and it is still serving me well.