Porsche Wrench

I am hoping that someone here can educate me on this subject.

I hear of shops in this area that have P-car wrenches and others that have P-car Certified Master wrenches. Someone tell me, what does it take for a wrench to achieve this honor. If I walked into a shop, should I see some sort of framed certification from Porsche hanging on a wall? Just curious.

Steve Anderson
76 Targa