by Precision Twist
Buy new: $18.06
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Precision Twist taper length drill bits have longer flutes and a longer overall length than jobber twist drill bits, which allows for deeper drilling. The shank diameter is the same as the drill bit size. High speed steel drill bits are for use with a wide variety of materials including steel, cast iron, and forgings. Cobalt steel drill bits provide better heat and abrasion resistance for high tensile alloys, stainless steels, and other difficult-to-machine metals. Their self-centering 135 degree point won't walk or skid when starting a hole, penetrates faster, and produces smaller chips.
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