How do I find goes Proxxon here (as with his other tools) the happy medium for the hobby wrench. The key is twice as expensive as the cheapest. But it can be quite professional with tools ranging from 300, - Compare. You will notice this already immediately if you have it only in your hands. A very different impression!
I can only recommend the torque wrench! And I do not just use it for nuts!
A peculiarity in this Schlüsel I have to mention:
Never should be solved with a torque wrench screws! This destroys the internal mechanism that "feels" the torque. In this key problem. In counterclockwise rotation the mechanism disengages! Left hand thread but you can still attract. For this you simply inserted through the square!