I now own one of those bits and have the 10 mm hex head bolts. When I redid the headgasket about a year ago I borrowed a t55 and it worked fine. Somehow I forgot they were hex and for 8 bucks at the local tool outlet I got the 12 pt. I will just keep it as they are kind of snotty about returns. Not worth the money. Besides I may end up with a Rabbit that needs it some day soon. Have to talk to the neighbor again this weekend.
...BTW your Bieber avatar is awesome.-Malone