IBX1508 Features: * 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 * High Carbon Steel Hexagon 1"" Across Flat Die 5/16""-18 NC Warranty: * Lifetime warranty does not cover abuse