The ESEE 5 is a heavy-duty fixed blade designed by SERE instructors for worst-case scenarios. 5.25-inch blade in 1095 steel with a 0.25-inch thick spine—some people call it a sharp crowbar. Canvas Micarta handles, glass breaker pommel, bow drill divot. At 16 ounces it's not a backpacking knife. It's a truck knife, a bug-out bag knife, a tool for when failure isn't an option. ESEE's unconditional lifetime warranty follows the knife, not the owner.