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 USABest suited to 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, HAN6640, ,