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SP/N-SP(LH)Spiral left tooth tapping, special for the processing of anti - tooth thread. ·Screwdriver precision grade：YAMAWA P level ·Screwdriver material：HSS-E ·The number of teeth in the cutting edge: 2.5 teeth ·Suitable cutting material： SP/N-SP (LH) tensile strength below 750N/mm2 medium carbon steel, copper, aluminum, magnesium alloy and so on... | |
