D102 Jobber Drill Sets Blue Bullet Sutton Tools Blue Bullet jobber drills are a general purpose drill bit designed for machine and hand held drilling ferrous metals. The blue finish reduces chip build up on the cutting edge and is a better choice when drilling ferrous materials. 118 web thinned point reduces the amount of thrust required Precision engineered parallel shank for accurate hole size Made from M2 High Speed Steel (HSS) offering the best combination of strength, heat & wear resistance Blue surface finish for ferrous applications. The steam oxide finish prevents chip build-up on the cutting edges and reduces cutting friction, especially in low carbon steels Pieces 21 Range - 1/16-3/8 X 1/64 Rises