High Speed Steel Twist Drill Bit, Fully Ground Black Oxide, 2Pcs

High Speed Steel Twist Drill Bit, Fully Ground Black Oxide, 2Pcs

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Description: 1. Made of high-speed steel, with great toughness and hardness, not easy to break, easy chip removal, the drill quenching treatment, improve the hardness of use. Surface black oxide treatment, not easy to rust. 2.
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