Best Allen key that I've ever seen

I have so many already get open at first sight irretrievably lost screws. The heads are spared and the screws can also be repeatedly tightened and loosened without these ausnudeln itself.
The money was truly worth it, given the whole annoyance to you with cheap Allen tool otherwise.
After intensive use, the key still look like new. The thicker tolerated also like to extend a pipe, only the thinner I would not expect.