【M3-M12 Tap Set】Each size includes 1x taper tap, 1x second tap, 1x plug and 1x die: M3 X 0.5, M4 X 0.7, M5 X 0.8, M6 X 1.0, M8 X 1.25, M10 X 1.5, M12 X 1.75 【Sturdy Material】The taps and dies are constructed of durable alloy steel for long life to build new tools or repair damaged and worn threads. Alloy steel construction provides superior blade hardness and thread cutting performance. 【Simple Operation】All taps and dies are designed for hand tapping and can be easily set with a T-handle tap. 【Easy Distinction】All taps and dies are clearly marked by size for quick and easy searching. 【Ideal for DIY】Ideal for professional machinists and home improvement, reaming of existing cars and engine mounts, screws/bolts for removing and cutting raw materials