4-12/4-20/4-32mm Spiral Groove Step Drill Bit M35 Cobalt Step Drill Bit Metal Taper Drill HSS Titanium-Coated Drill Bit

4-12/4-20/4-32mm Spiral Groove Step Drill Bit M35 Cobalt Step Drill Bit Metal Taper Drill HSS Titanium-Coated Drill Bit

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