Smith & Wesson Knives The famous gun manufacturer has designed their own line of knives with the same quality and attention as the guns they have made for years. If you demand the best, then these are the knives for you. All Smith & Wesson knives have a lifetime warranty. Smith & Wesson H.R.T. Knife Designed by Darrel Ralph and Mike Lamprey this one-handed snap open design is used by search and rescue teams. Features a black magnesium handle, 3.65" half serrated blade, 440C Bead Blasted steel blade, pocket clip and weighs 4 oz.