I agree with the above post. Drill a pilot hole as close to center of the spot weld as you can. I use Blair (brand)
spot weld cutters,. They come in 1/4", 5/16" and 3/8" cutters that attach to an arbor. I use a 1/2" air drill as
it has a slower rpm and more power than a 3/8" drill. Buy extra pins and cutters as they will break. Try to drill
as square to metal you are drilling to prevent breakage. I also use Irwin double ended 1/8" drill bits for the pilot
hole. They seem to last the longest, even though they are made in China now like everything else.
