15.1mm 15.2mm 15.3mm 15.4mm 15.5mm HSS Reduced Straight Crank Twist Drill Bit Shank Dia 12.7mm 1/2 inch 15.1 15.2 15.3 15.4 15.5

15.1mm 15.2mm 15.3mm 15.4mm 15.5mm HSS Reduced Straight Crank Twist Drill Bit Shank Dia 12.7mm 1/2 inch 15.1 15.2 15.3 15.4 15.5

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