DIY Pressure Wrench?

[Bittersweet]

I use a couple nails, one has the sharp tip flattened and shaped to fit in narrower locks, the other is a bit thicker and wider, but still works in the locks I've been practicing with. Granted, only 3 so far, and one's broken, but I'm trying.
then again, I also broke my pick...

[Gordon Airporte]

You have to use a fairly brittle plastic to take the strain at those thicknesses and unfortunately, they don't flex all that well.

If you come up with something good, I would like to see them as well.

Romstar

I was thinking of doing a Peterson flat style wrench - that was my little bolt of inspiration. The brittleness doesn't have to be so exactly accounted for with that stlye. I don't reacall having seen anyone try that, but then I don't read every wrench thread.
I'm still looking for some material, but I need to finish up my metal flat wrenches first.