Nylon Guitar Strings. Axiom Guitar Strings are individually selected and specified and made entirely in the USA in one of the world's most prestigious string factories. We use only the finest nickel, phosphor bronze and nylon to create our strings and we feel they are easily the equal of any of the "big name" brands. Our Nylon guitar strings give you a bright rich tone with excellent projection and clarity. These are high tension strings which results in a crisper and more defined sound than low or medium tension strings. We are proud to bring you these superb quality USA made strings at half the price of the "big names"!