Taps and Drill Bits - Premium 6542 high-speed steel helical taps with a nitride coating for rust resistance. Fast cutting, high-temperature resistance, and long service life. Smooth Cut - The spiral groove helps remove dirt and prevents easy tap breakage. Good tapping and drilling performance, high precision and speed improve efficiency and work quality. Chip evacuation design - Spiral taps are good for threading, fast with high precision, smooth chip evacuation, smooth cutting surface, no residue, with good machinability, they can press the button of blind holes. Widely used - For tapping all through hole applications in low carbon steels, stainless steel, alloy steels, aluminum, copper, metal and wood. Package contents: The tapping tool kit contains M3, M4, M5, M6, M8, M10, and M12 taps which perfectly meet your various needs.