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Precision Twist Drill - Extra Length Drill Bit: 5/16″ Dia, 118 ° Point, High Speed Steel - 78571619 - MSC Industrial Supply
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5PCS 5/16"Inch HSS General Purpose Heavy Duty Jobber Twist Drill Bits,Black oxide,ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc. (5 /16) - Amazon.com
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DeWALT - Mechanics Drill Bit: 5/16″ Dia, 135 ° Point, Cobalt, Straight-Cylindrical Shank, Pilot Point - 03801610 - MSC Industrial Supply
5/16" HSS Black & Gold KFD Split Point Jobber Length Drill Bit, Killer Force Drill Bit | KFD5/16 | DrillsandCutters.com
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