The ESEE Model 5 was designed by Military SERE instructors as a downed pilots survival knife. Its a survival tool that will pry, cut and chop the user out of a downed helicopter in a remote jungle, a vehicle on the side of the road or an unforgiving remote wilderness. All ESEE-5 knives feature a sharpened glass breaker pommel, saber ground blade and a fire making bow drill divot in the handle. As with all ESEE Knives, the Model 5 is backed by the famous ESEE no questions asked lifetime warranty. If you break it, just send the broken knife back to ESEE for a replacement.