One of the more confusing aspects of selecting drill bits and taps is the variety of available coatings since the manufacturers provide little information about the coatings themselves. The issue is further confused by the wide range of quality of coatings of the same type, despite looking similar.

For those who have never used a coal forge in their daily work, especially in a mobile practice, there are a few things to know. It takes some time and effort to get a coal forge up to a nice even working heat.