Precision ground alloy steel for accuracy. Useful assortment of metric sizes and thread pitches. Supplied in a durable storage tray. Contents:. M3 X 0.5 mm. M4 X 0.7 mm. M5 X 0.8 mm. M6 X 1.0 mm. M7 X 1.0 mm. M8 X 1.25 mm. M9 X 1.25 mm. M10 X 1.5 mm. M12 X 1 .75 mm. M3 – M12 die holder. 1 X  tap wrench (m3-m12). 1 x storage tray.