Material: Alloy steel and carbon steel you can choose

40PCS metric tap and die set
CONTENTS:
16 Taps: 3× 0.5, 3× 0.6, 4× 0.7, 4× 0.75, 5× 0.8,
5× 0.9, 6× 0.75, 6× 1.0, 7× 0.75, 7× 1.0, 8× 1.0,
8× 1.25, 10× 1.25, 10× 1.5, 12× 1.5, 12× 1.75
16 Dies: 3× 0.5, 3× 0.6, 4× 0.7, 4× 0.75, 5× 0.8,
5× 0.9, 6× 0.75, 6× 1.0, 7× 0.75, 7× 1.0, 8× 1.0,
8× 1.25, 10× 1.25, 10× 1.5, 12× 1.5, 12× 1.75
1 NPT Tap: 1/8-27 1 NPT Die: 1/8-27
1 Tap wrench: M3-M12
1 T-Type Tap wrench: M3-M6
1 Die wrench: 25mm O/D
1 Screwdriver 1 Screw Pitch Gauge