I am trying to replace my door striker, but need to know the size of the hex wrench. I have tried every one I have and it's either a bit small or a bit too large. Thanks!

 

T-50 Torx. Should be the same as your set belt mountings.

 

Bah... got beat to an easy one, X2 on what Grey said. It's also the same Torx used on the tensioner pulley (just to say i added something else), btw.

Oh, and NEVER use hex wrenchs on torx applications, only on emergencies (stranded on the road in the middle of nowhere), you'll damage them.