There are times that I customize wrenches to make them work better.
First time I did this years ago, was to make a thin wrench to tighten the
double nut on the top of a shock mount.
When you show a customized tool to the Snap-on tool guy, sometimes they
come out with it as a new product. LOL
For some reason, Sears comes out with innovative new wrenches months before
anyone else.....even without seeing what I made.....
and theirs are also guaranteed for life.