BB Twist Drill Bit 1/2 Inch HSS M2 M35 Cobalt Metal Steel Hole Making Tool CNC Drilling 12mm Shank 12~35mm

HSS:
Black is suitable for aluminum, steel plate, plastic, etc.
HSS-Co: for steel, stainless steel,
D=12mm,Overall length=140mm, cutting length=82mm

Note: it is best to add coolant when drilling.

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