Manufactured from Alloy Steel with HRC 58-62. Contents includes 2 Die Handles (1" & 1.5), 2 Tap Adjustable Tap Wrenches (1/8-1/2", 1/4-3/4"), 5 Drill Bits: 2.5MM, 3.3MM, 4.2MM, 5.0MM, 6.8MM, 5 X Screw Extractors: No.1 No.2 No.3 No.4 No.5, 35 Die Sizes (10NC, 10NF, 1/4NF, 1/4NF, 5/16NC, 5/16NF, 5/8NC, 3/8NC, 3/8NF, 1/8NPT, 7/16NC, 7/16NF, 1/2NC, 1/2NF, 1/2BSW, M3X0.5, M4X0.7, M5X0.8, M6X1.0, M8X1.0, M8X1.25, M10X1.0, M10X1.25, M10X1.5, M12X1.25, M12X1.5, M12X1.75, M14X1.25, M14X1.5, M14X2.0, M16X1.5, M16X2.0, M18X1.5, M20X2.5) and 35 die sizes (3/8NC, 3/8NF, 7/16NC, 7/16NF, 1/2NC, 1/2NF, 1/2BSW, 5/16NC, 5/16NC, 5/16NF, 1/4NC, 1/4NF, 10NC, 10NF, 1/8NPT, M10, M10*1.25, M3X0.5, M4X0.7, M5X0.8, M6X1.0, M8X1.0, M10X1.0, M10X1.25, M10X1.5, M12X1.25, M12X1.5, M12X1.75, M14X1.25, M14X1.5, M14X2.0, M16X1.5, M16X2.0, M18X1.25, M18X1.5, M20X2.5)