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25PCS Edge Ground Tin Coating HSS Jobber Length Twist Drill Bit

25PCS Edge Ground Tin Coating HSS Jobber Length Twist Drill Bit
Product DescriptionMaterialComponent (%)HSS 4241C (0.9~1.0); Si(1.0~1.3); Mn(0.25~0.4); P(0~0.035); S(0~0.009);Cr(3.8~4...