A6 Front Brake Guide pin question

[walian at att.net]

Hello all,

  I am getting ready to put new front brakes on my 97A6Q and I was wondering
if anybody knows what the allen wrench size for the guide pins are on the
front caliper. I have tried 6mm which is to small and 8mm which is to big. Do
they make a 7mm allen wrench?

Frank