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3pcs HSS Step Drill Bits Triangular Spiral Grooved Core Cone 4mm To 12mm 20mm 32mm Chamfer Hole Cut Cutter #9051674
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More about this item
Highlights
What is Step Drill Bit
· Step drill bits can be used with metal and wood.
· Useful for drilling pilot holes in woodworking and sheet metal-based projects.
· Allows drilling holes of multiple sizes with same drill bit; can be used to clean away waste material in holes.
Titanium nitride (TiN) coating is wear resistant, inert and reduces friction. Use it
on cutting tools, punches, dies and injection mold components to improve tool life
two to ten times, or more, over uncoated tools.
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