DANGER WIL ROBINSON!!
These bolts are NOT TORX! They are a 12 point bit typically refereed to as a "Triple Square".
Three sizes most often used by Audi/VW are:
8 mm - halfshaft bolts for most VW's and the smaller Audi chassis'
10 mm - halfshaft bolts for the larger Audi chassis', also some head bolts if I'm not mistaken (diesels?)
12 mm - head bolts for most of the Audi/VW heads
From: email@example.com [SMTP:firstname.lastname@example.org]
Sent: Tuesday, May 05, 1998 1:38 PM
Subject: halfshaft remowing tool
These bolts are easy to damage if the torx bit is not seated completely.
The small pipe wrench on the outside is safe solution. My C 03.