15-Piece Jobber Length Fractional Drill Bit Set with Metal Case by KnKut®. Premium grade KnKut Drill Bits are manufactured from a high grade Molybdenum high speed steel, that has a high vanadium content. KnKut Drill Bits are salt nitride treated, actually penetrating the tool's surface giving drill bits the hardness to drill tough materials such as stainless steel and titanium alloy.
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