CTD Metric Magnum Super Premium 7mm Drill Bit (2 Pack);

CTD Metric Magnum Super Premium 7mm Drill Bit Part #49570 Length = 4 1/8" Flute Length = 2 3/4" Metric Jobber Length Drill Bit Magnum Super Premium Special Hi-Molybdenum tool steel. 135 split point for fast penetration and accurate starting without center punch. Precision ground: point, flutes, body, clearance, and drill diameter for the ultimate in accuracy and performance. Body and clearance are gold surface treated for maximum lubricity. Heat treated at 2185 F and then nitro-carburize finished at 950 F to be measurably harder than high speed steel. Nitro-carburized steel withstands substantially higher drilling temperatures while maintaining sharpness. Especially designed for hand held drills. Flats on shanks give positive chuck-grip (3/16 and larger). Recommended for use in work hardening grades of stainless steel and other hard metal drilling applications.