Features and Benefits: Advanced die geometry: Allows for faster cutting with longer life; Material types: High carbon steel for cutting of external threads by hand - High speed steel for longer life; Etched: Die size is etched on each tool for easy identification; All Hanson taps and dies are made in USA; Best suited for maintenance and repair work; Recommended for use with hexagon die stock; In areas with limited space, die can be used with a wrench or socket;