How do you screw up allen head? I like them specifically because you can't really strip them.
Well there are different allen sizes in Europe and most skateboard hardware are US sizes. You have metric and inch versions of allen keys and screws. Not really a problem if the hardware comes with a small allen key, but a pain in the ass when you lose it...
Basically it means they do sell allen keys/screws at the local hardware stores but those fall 'in between' American sizes. That's because the sizing is different here Europe. And that makes the keys slightly too thin or too big which screws up the heads...
Example to illustrate what I mean. These are actual allen sizes:
AMERICAN 7/64" 2.78 mm > EUROPEAN 2.5 mm
AMERICAN 1/8" 3.18 mm > EUROPEAN 3 mm
See?