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. Brad point drill bits are the best choice for drilling wood and these drill bits are perfect for drilling pen blanks. High Speed Steel for accuracy and sharpness, and feature extra long center point. The center point is actually a continuation of the flutes and bores rather than being pushed through the work piece.