As I was walking home today thinking about my evil Yale X5 ( up to three spools now ) i thought about this as a possible security pin design. I made the pictures up on a technical drawing program:
It really wouldnt be a good pin design. Its basically a single serrated pin, and the rounded end would make the shearline easier to hit once you get past the serration. Reverse picking a lock with those pins would be pretty easy, unless there were 20-30 of them...... Chuck
Hehe yeah. Took about 5 minutes to do though. It was originally pink but i felt I don't think i could post not only a very bad 'security' pin but also a pink one
Beany
If I had only known, I would have been a locksmith. - Albert Einstein
up to three spools now 
) i thought about this as a possible security pin design. I made the pictures up on a technical drawing program:
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