The Coast Product Polysteel Folding Knives, Nos. BX300 and BX315, are made of stainless steel and offer co-molded, hard nylon fiberglass-filled inner frames, which are covered by a non-slip thermo plastic rubber (TPR) outer layer. These features help to make a long day working with knives much easier. For added safety and dependable use, they include an easy-to-operate back-lock. The BX300 has a 3" blade, 7.125" overall length and weighs 1.6 oz. The BX315 has a 3.25" blade, 8.625" overall length and weighs 3.6 oz. These knives are backed by a lifetime warranty.