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The Long HSS Twist Drill Bit Ground is for drilling deep holes through metal with maximum precision. Its extended length makes this long bit capable of drilling deeply. The self-centring split-point tip combines active cutting and perfect centring without wandering, delivering maximum precision. This ground bit made of HSS (high-speed steel) enables a faster drilling rate. It has a cylindrical shank system (shank equal to drill bit diameter) and is intended for use in drill stands and drill drivers