Material: Alloy steel and carbon steel you can choose

60PCS metric and inch tap and die set
Content
10 Metric Taps: 3× 0.5, 4× 0.7, 5× 0.8, 6× 1.0, 7× 1.0,
8× 1.25, 9× 1.25, 10× 1.0, 10× 1.5, 12× 1.75
10 UNC Taps: 4-40, 6-32, 8-32, 10-24, 12-24,
1/4, 5/16, 3/8, 7/16, 1/2
6 UNF Taps: 10-32, 1/4, 5/16, 3/8, 7/16, 1/2
10 Metric Dies: 3× 0.5, 4× 0.7, 5× 0.8, 6× 1.0, 7× 1.0,
8× 1.25, 9× 1.25, 10× 1.0, 10× 1.5, 12× 1.75
10 UNC Dies: 4-40, 6-32, 8-32, 10-24, 12-24,
1/4, 5/16, 3/8, 7/16, 1/2
6 UNF Dies: 10-32, 1/4, 5/16, 3/8, 7/16, 1/2
1 NPT Tap: 1/8-27 1 NPT Die: 1/8-27
1 Tap wrench: M4-M12(3/16-1/2")
1 T-Type Tap wrench: M3-M16(1/16-1/4")
1 Die wrench: 25mm 1" O/D
1 Screwdriver 1 Metric Screw Pitch Gauge
1 Inch Screw Pitch Gauge