Originally Posted by
burglnar
We've talked about the possibility of either rounded outer (a la phil wood/ paul) with a unique tool or a unique hexagonal outer. Either one would require a special tool, which I guess would be the point of it to give it anti-theft properties.
The only special tool needed for the "unique hex" would be a pair of these:
Don't give them anything to grip onto. Something hemispherical or perhaps a flat cone would be good.