Manufactured from Alloy Steel with HRC 58-62. Contents include 1 Tap Wrench - American pattern 1/2â? capacity, 1 T Typeap Wrench 1/4â? capacity, 1 Sew pitch Gauge, 1 NPT Die: 1/8 - 27, 1 NPT Tap: 1/8 - 27, 1 Die Handle, 1 Screwdriver, 17 die sizes (4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 1/8-27 NPT) and 17 tap sizes (4-40, 6-32, 8-32, 10-24, 10-32, 12-24, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 1/8-27 NPT)