Columbia River Knife & Tool - Nathan's Knife Kit. Model: CR1032. 4 3/4" closed. 3 1/2" blade. Made from softwood, hardwood and bamboo. All parts shaped with safe rounded edges. Ready to assemble without tools. Press fit or permanent assembly options. Teaches mechanical and woodworking skills. When assembled, the model operates exactly like a lockback folding knife, teaching the principles of levers, springs and locks. Complete detailed instructions included. It makes a fun and educational craft project for a parent, grandparent or mentor and children seven years of age and older. Klecker design. Hang packaged.