Eastwood Skip-Proof Spotweld Cutter
Product Review (submitted on October 15, 2012):
The real trick in using these cutters is to spray a little WD40 (or other lubricant) on the spot weld before you start cutting. I went thru my first cutter very quickly before I realized I hadn't lubricated the weld. First tip lasted maybe 15 welds. Now that I am using the lubricant, my current tip has lasted well over a hundred welds and the cutting is still easy. In fact, the trick now is to not completely drill thru the 2nd sheet of metal.