6 Pcs HSS Countersink Drill Bit 1/4" Hex Shank Chamfering Drill Bit Set Quick Details: [Sharper and Tougher] The whole drill bits is using high-frequency quenching for heat treatment, with titanium to ...View More
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HSS Countersink Drill Bit Set 6 Pcs 1/4" Hex Shank Titanium Coated Surface