Features High-Quality High-Speed Steel Construction: Made from Sturdy high-speed steel, this tap and die set ensures long-lasting performance and resistant to wear. Its robust design makes it ideal for cutting threads in various materials, including cast iron, steel, aluminum, and copper. Precision CNC Machining and Heat Treatment: Each cutting tooth in the set has been accurately CNC machined and heat-treated to a hardness of 60 HRC. This precision engineering ensures optimal thread processing performance and consistent results. Comprehensive 45-Piece Set: The set includes 20 taps, 20 dies, 1 die hinge, 1 tap hinge, 1 T-type tap hinge, 1 round die band, 1 screwdriver, and a storage box. This comprehensive collection provides all the tools you need for a wide range of threading tasks. Versatile for Both Metric and Imperial Threads: This tap and die set supports both metric and imperial thread types, including fine threads and 55° cylindrical pipe threads. Its versatility makes it suitable for various applications, from DIY projects to professional machining. Convenient Storage and Portability: The included storage box keeps all components organized and protected, making it easy to transport and store. This feature ensures that your tools remain in excellent condition and readily accessible for future use. Spec: Item Type: Tap Die Set Imperial System: System: Imperial System Function: Squeeze Thread Type: Fine Thread Tap Size: Wire Tap + Die: 1/4NC20; 1/4NF28; 5/16NC18; 5/16NF24; 3/8NC16; 3/8NF24; 7/16NC14; 7/16NF20; 1/2NC13; 1/2NF20; 9/16NC12; 9/16NF18; 5/8NC11; 5/8NF18; 3/4NC10; 3/4NF16; 7/8NC9; 7/8NF14; 1NC82; 1NF14 (One Wire Tap And One Die) Metric: System: Metric Function: Squeeze Thread Type: 55° Cylindrical Pipe Thread Wire Tap + Die: M6X1.0; M6X0.75; M8X1.25; M8X1.0; M10X1.5; M10X1.25; M12X1.75; M12X1.5; M14X2.0; M14X1.5; M16X2.0; M16X1 .5; M18X2.5; M18X1.5; M20X2.5; M20X1.5; M22X2.5; M22X1.5; M24X3.0; M24X1.5; (One Wire Tap And One Die) packing list: 20 x Tap 20 x Die 1 x Die Hinge 1 x Tap Hinge 1 x T Type Tap Hinge 1 x Round Die Bands 1 x Screwdriver (Random Color) 1 x Storage Box (Random Color) Package List 20 x Tap 20 x Die 1 x Die Hinge 1 x Tap Hinge 1 x T Type Tap Hinge 1 x Round Die Bands 1 x Screwdriver (Random Color) 1 x Storage Box (Random Color)