Material: The taps are made of 45# heat-treated steel and the dies are alloy steel which have good hardness, strong strength and long durability. Adjustable Ratchet Wrench: The tap wrench is adjustable to fit different taps and can hold the tap firmly and safely. Full Tool: Including 9 x Taps, 9 x Dies, 1 x Tap Wrench, 1 x Wrench (M3 x 0.5, M4 x 0.7 M5, M5 x 0.8 M6 x 1.0, M7 x 1.0, M8 x 1.25, M10 x 1.5, M12 x 1.75). Comes with a plastic box for convenient transport and storage. Easy Distinction: All taps and dies are clearly identified by their size for quick and easy search. Application: This set of taps and dies is perfect for vehicles and machines to create wires. Specifications: Material: alloy tool steel. Tap and die size: M3 x 0.5 M4 x 0.7 M5 x 0.8 M6 x 1.0 M7 x 1.0 M8 x 1.25 M10 x 1.5 M12 x 1.75 Tap wrench size: M3-M12 Spanner size: 25 mm Package includes: 9 x taps. 9 x Dies 1 x Tap Wrench 1 x adjustable wrench