This professional quality 40 Piece Tap and Die Set is made from high quality heat treated fine carbon steel for additional strength and durability. It is perfect for cleaning and cutting threads on mild steel and aluminium. The set includes an adjustable and T-handle tap wrench, an adjustable die wrench, knurled screws, taps and dies. It features M3 to M12 taps and hexagon dies with thread-pitch from 0.5mm to 1.75mm, including both fine and coarse threaded taps and dies in MM sizing. The set comes in a storage case.