Feature 1Goodquality materials and highspeed steel structure ensure durability of the tap die set. 2All cutting teeth have been accurately CNC machined, and have undergone an accurate hardness 60 HRC heat treatment to obtain the best thread processing performance. 3The package includes a storage box for easy transportation and safe storage. 4Tap die set can be used to cut cast iron, steel, aluminum, copper and other materials. 5The package includes 20 taps, 20 dies, 1 die hinge, 1 tap hinge, 1 T-type tap hinge, 1 round die bands, 1 screwdriver and 1 storage box, fully equipped. Item Type: Tap Die SetImperial System:System: Imperial SystemFunction: SqueezeThread Type: Fine ThreadTap 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: MetricFunction: SqueezeThread Type: 55 Cylindrical Pipe ThreadWire 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) Package List 20 x Tap20 x Die1 x Die Hinge1 x Tap Hinge1 x T Type Tap Hinge1 x Round Die Bands1 x Screwdriver (Random Color)1 x Storage Box (Random Color)