What type and size of tool for cylinder head bolts?

I used a torx to remove the old ones but would like to have a correct tool with a correct fit when fitting in the new ones.

Thanks
Alex

Are these the Ribe bolts? Look like a Torx, but have a square section rather than the 'points' of a Torx.

the tool you are looking for is on ebay.
Saw it a few days ago.

Well I figured as much that it's available from ebay and that the RIBE tool probably is the right kind, but that still doesn't help me with what size to get since there's m10 m11 m12 and m13.

sorry can't help you measure the size of the tool you need for the cylinder head

But if your going to buy one socket why not buy the set so it covers all the other bolts as well?

I think this was the one I ended up getting

http://www.screwfix.com/p/forge-steel-specialist-bit-star-socket-set-37pcs/63378#

Seems to cover most of them. If they are not available locally maybe someone in the UK could offer to mail them over to you?

Visited my local fiat shop, and once again with out success. And just when I thought "there's always ebay" I made one last stop at my local hardware store and they had all sizes of ribe tools, SCORE!