Dophee 10PCS HSS Double Ended Drill Bits, 4.2mm Cobalt Drill Bit Set Electrical Drilling Tool for Metal Carbon Steel Aluminum Working Rotary Tool

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  • SPLIT POINT 135 DEG. ANGLE No center punch is needed-- the aggrevsive 135 Deg. the 135 Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander".
  • WIDE APPLICATION The cobalt drill bit set can be used for industrial drilling stainless steel, hard plastics, wood, spring steel pond, high carbon steel, aluminum metal all kinds of high-hard steel strength metal. And the twist drill bits set included the majority of power drill currently on the market.

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