I found this site while doing an internet search on drill and tap sizes. I'm a supermarket refrigeration tech in Colorado Springs, CO. I O/A braze and own a Lincoln SP-175 MIG welder. I bought the welder for working on my Jeep and on stuff around the house. I use it every once in a long while at work. I know it's a bit overkill for around the house BUT better to big than to small .