Anyone can make this super simple tool for splitting wood when camping or backpacking

Why is a convex edge is the best shape for an axe or hatchet? What is the best tool for processing firewood when backpacking or camping? I explain about edge geometries then show a simple, very lightweight tool that works just as well (maybe better?) than a hatchet or knife for splitting wood. Bring it backpacking, camping, or throw it in a bug out bag, survival kit, etc.