I have a customers machine with 3 - 6mm allen head screw that have become one with the machine.... ::Rant::
http://lh3.ggpht.com/_ar4NWGG0rGY/S_...0/IMAG0003.jpg
I've busted my 6mm Allen wrench twice now so I'm thinking I need a meaner tool! Is ther such a think as an Metric Impact Allen Socket??