Posted 8/4/2016 20:34 (#5451246 - in reply to #5451225) Subject: RE: What drill bit for semi truck frame ? (nt)
Middlesex County, Ontario
If you are asking what drill BIT, as in single, an annular cutter in a mag drill.
If you want to hand drill them you will need drill BITS, plural. Start with 1/4" and work your way up 1/8" or 1/4" at a time. Go slow, use oil, and be prepared to sharpen bits every hole. Any good quality HSS drill should be fine.