Here's a useful fixture if you want to mount a Wiha screwdriver set (this one, available on Amazon) to a ferromagnetic surface. In my case, this was a milling machine, but there are obviously other applications as well.
Step 1: Materials
Step 2: Print Spray and Mark
Print based on STL found here. Mask off the sides of the holder, then spray the back so it doesn't slide around on your surface.
Fill in recessed "+" and "-" symbols with a marker as desired.
Step 3: Add Magnets and Use
Magnets will simply snap into place, and it's ready for attachment to a metal surface and your drivers!
Note that Amazon links are affiliate.