[MITCHELL]

This stainless steel is the hardest material I have ever drilled threw. If you want to take on a project like this ,some things you want to know. Brand new Milwaukee cobalt drill bits didn't even work a waste of money for this project. What worked was masonry bits and drill as slow as you can cooling with water in a squirt bottle. $2.50 per bit after one or two thick holes you have to resharpen drill bit. Most all drill bits regardless what there made out of, resharpen at an angle of 118° .I made a simple wood block jig with a hand coping saw to resharpen drill bits, just hold it at a right angle to a bench grinder, or a hand grinder....tight lines