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DIAMETER NUMBER
1
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FLUTE LENGTH INCHES
2-5/8
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OVERALL LENGTH INCHES
3-7/8
Cobalt Drill Bits - Made to NAS 907 Type J specifications, these cobalt jobber length drills are used for drilling in tough, high tensile strength materials like stanless steels, titanium and inconel. They are made of cobalt high speed steel, with heavy duty flute construction and 135 split point.