Power Steering Bolts + External Torx Size?

I was just wondering what the size of the external torx bolts are, that are holding the power steering on? I want to get the right one instead of buying a whole set and wasting money. I also did a search but in all the threads I saw they only said that they were a torx bolt but not the specific size. I think its an E12.

Thanks,

Dan

when I get my external torque set in ill put up which one it is for future people to see.