Sutton Jobber Blue Bullet Drill Bit 4.2mm - D1020420Sutton 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 materialsFeatures: 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 Sutton Tools was established in 1917 as a family business that produced threads and gauges. Over the years, the company has grown and now offers a wider range of cutting tools. Sutton Tools is still a family-owned firm in Australia today, and it is well known for its premium power tool accessories and cutting tools for the hardware industry as well as a variety of speciality industrial applications.