Only good thing I can say about Torx, no such thing as English or metric ones, but do come in both sexes, male and female. Males come in two different types, standard and tamper proof, these have a hole drilled in the end of them. Ran across a vehicle that used tamper proof, Carquest sells a set of these. When I was there, also seen sockets for these so-called theft-proof lug nuts.
Torx are tapered so if they are not fully seated, can strip them out. In production used on engines, they use an impact wrench before the engine is installed in a body, can really put a lot of axially force with an impact wrench so you don't strip them out, but can't use these after the engine is installed. Allen or hex heads screws don't have this problem, but need a complete set of these.
Crowfoot comes in both English and metric sizes, sure need these when removing a power steering rack. Don't dare use an open end wrench on tubing fittings, make special wrenches for these as well, both English and metric, the threads are the same for either, but slightly changed the diameter for metric.
Model A Ford came with all the tools you needed to work on it, even a special water pump wrench. What I had to buy was a spring spreader, saw that hanging in my garage, what am I keeping this for? Wonder if its worth anything. Sure needed this for replacing King pins.
Ha, whenever I work on a new vehicle, tell my wife I have to buy another special purpose tool, what, with all the tools you have? Really nasty about this, some engineer must be bored.
