[martinced]

What about Mul-T-Lock double-sided keys? Is there any .gif or YouTube video showing how they work?

They seem to be much much harder to lockpick. My key-guy can lockpick garage doors and cars and whatnots but if I forget my Mult-T-Lock double-sided keys he needs to drill through the hole and destroy the entire system to be able to open the door, which then needs a new mechanism.

One of my neighbour got robbed and the thiefs did the same: they drilled through the Mult-T-Lock hole.

Can these be lockpicked? If they can, it seems to be way harder than regular keys or than typical double-sided keys.