[Test-Equipment] Difficult Allen Screws

[Dr M J DiGirolamo]

Dear Colleagues,

         I need some help and or tips on how to remove frozen Allen 
set-screws like the ones found on equipment knobs.

         The typical scenario happens when trying to remove a stubborn set 
screw. The Allen wrench "slips" and rounds the insertion pattern 
slightly.  Has anyone heard of a slightly oversized set of Allen wrenches 
(on the order of .001" - .002") or is this the wrong approach?  If they 
exist, who supplies them?

     Any comments and/or suggestions are welcome.

Regards,

Mike DiGirolamo, W4XN
Charlottesville, VA 22901