Snake Oil Brand "ROCK" Electric Guitar Strings 9-46 R-STMB Light top heavy bottom 9-11-16-26-36-46 Specially designed nickel-iron alloy combines several other components for extra long life, durability, and low fret-wear Designed for the modern guitarist who wants maximum output, harmonic response, and ultimate flexibility These string sets work well on any single-coil or humbucking equipped instrument Incredibly long life...SERIOUSLY.