McMaster 29325A22 Carbide Drill Bit Set Uncoated, 21 Pieces G6880535 Number of Cooling Stages -

Number of Cooling Stages - Conventional System 1

IEC (international)

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(14) Piece Standard Hex Key Set and Metric Hex Key Set

McMaster 29325A22 Carbide Drill Bit Set Uncoated, 21 Pieces G6880535 Number of Cooling Stages -The hardest and most wear resistant drill bits you can buy. Carbide bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult to machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications. Jobbers' LengthThese bits