These pen making drill bits are made from precision ground high speed steel that keeps a sharp edge longer, resists wear and possible over heating. Smooth deep flutes remove stock faster and produces smooth side walls
Made from precision ground high speed steel
Stays sharp longer
Resists wear and possible over heating
Smooth deep flutes
Set Includes; 7mm, 10mm, 11mm, 27/64", 3/8" and the letter "O"