Eric Smith wrote:
  Chuck Guzis wrote:
  The 6-lobed Torx security bits are pretty easy to
come by just about
 anywhere.  The 5-lobed Torx security bits, on the other hand, are
 considerably more difficult to find, though not unobtanium. 
 If it has five lobes, I don't know what it is, but it isn't Torx. 
Torx-plus, and the ones with a centre pin are called "Resistorx".  You
also get them with the "male" side on a bolt head in both six- and
five-lobe versions, the latter being used to hold certain VW brake
calipers onto the hub.
Gordon