Tap Guide Block

I had built a tap guide block many years ago from a scrap of 3/4" thick aluminum bar I had laying around. It works fine, but is a bit large and can be difficult or impossible to position in tight quarters. This little guide, only 1-1/4" in diameter can get in some of those tight places. It is from the February 1991 issue of Projects in Metal magazine. The article "Tapping Block" was by Lane Sisson.