Taking some of this thread's advice in hand, as well as looking at various brands of security pin, I present my gnarliest pin creations to date:
So the first four pins are relatively mundane, serrated and mushroom pins are nothing new or innovative, except that I put some of Oldfast's ideas into practice and tapered the 2nd pin slightly. However, I'm especially proud of the last two pins, considering all of this was done on a crappy 1200 RPM drill jerry-rigged in a vise. The fifth pin is essentially an ASSA knockoff, sometimes referred to as a "christmas tree". One of these:
. The sixth pin is definitely not a screw-up! I totally meant to have the serrated pin transition into a sloped (?) spool. Not entirely sure what to call it, but I think 'coldrake pin' has a certain ring to it...
In all my excitement though, I forgot to pick it! It's going to put up a lot of resistance, but I'm confident I can open it.
-Colin