Full control

Have such a part already used fifteen years ago at school and long sought a replacement when I lost my. The adjustment mechanism is IMHO simply ingenious: To adjust one turns on the yellow screw back. This slide the two shell halves (which, incidentally, made of metal and not from plastic are vile) apart and you can adjust the blade. By tightening the screw, the two handle halves clamp the blade then a bombproof.
I've never had another cutter in his hand, in which the blade can be clamped so tightly and precisely.
The only disadvantage is that you can not quickly adjust or slide out with a hand or move the blade. For permanent in-out work, he is not really usable. However, if you need a cutter, which allows you to work accurately and in which the blade is tight, I know nothing better.