Manufactured from high quality C45 carbon steel, this 21-piece set is suitable for cleaning and cutting threads in mild steel, aluminium and brass. The set includes a tap wrench (M3-12), a 25mm die stock holder, a screwdriver, 8 metric taps (3x0.5mm to 12x1.75mm), one 1/8 inch NPT tap, 8 metric dies (matching tap sizes), and one 1/8 inch NPT die. It comes in a robust plastic storage case and is backed by a 5-year guarantee.