CTD Metric Magnum Super Premium 7mm Drill Bit (2 Pack)
CTD Metric Magnum Super Premium 7mm Drill Bit Part #49570Length = 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.