Actually, the first two Rambo knives were made by Jimmy Lile. Hibben made the third and fourth - neither had sawteeth. The full width teeth on the Lile knives were designed for cutting wood and they do work. The Lile saw was never meant to be used for large sawing tasks, but more for notching poles to build shelter. The narrow front teeth on the clip are designed to act as barbs to hold fish or small game if the knife is converted into a spear. You're correct, the Rambo knife was intentionally oversized to look more menacing and show up on screen.