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 (3x0.5, 3x0.6, 4x0.7, 4x0.75, 5x0.8, 5x0.9, 6x1.0, 6x0.75, 7x1.0, 7x0.75, 8x1.25, 8x1.0, 10x1.25, 10x1.5, 12x1.75, 12x1.5, 1/8-27 NPT) and 17 tap sizes (3x0.5, 3x0.6, 4x0.7, 4x0.75, 5x0.8, 5x0.9, 6x1.0, 6x0.75, 7x1.0, 7x0.75, 8x1.25, 8x1.0, 10x1.25, 10x1.5, 12x1.75, 12x1.5, 1/8-27 NPT)