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The 6 Piece Thread Tap Drill Bits Set can complete hole drilling, tapping, deburring, and countersinking in one operation and greatly save processing steps and time costs, improve working efficiency. The thread drilled is very stable. Made of high-quality HSS rustproof, solid, and durable. Back tapered beyond tap to prevent thread damage from over-drilling
This can be applicable to some types of carbon steel and ordinary steel, copper, and aluminum-magnesium alloy drilling hole. Six different sizes of drill bits can help you get different sized holes. It has high-quality hex shank to ensure a strong connection to drill chuck.
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