This is a working softwood model of a lockback folding pocket knife suitable for as a craft project for adult mentors and children age seven and older. All parts are shaped with safe rounded edges. Ready to assemble without tools. Can be built with "press fit" or permanen assembly. Complete detailed instructions included. Teaches mechanical principles of levers, springs and locks as well as woodworking skills. Blade is 3.25". Closed handle length is 4.625". Open length is 8". Imported.