SIT's Power Wound series electric guitar strings feature nickel plated steel wrap wire over a high tempered steel hex core. Built with state of the art winding machines and the Stay in Tune processes, Power Wounds deliver rich, full voiced tone, and great sustain. SIT also treats every string with an exclusive SIT (Stay-In-Tune) process in which a chemical adhesive is applied to the twist at the ball end, to ensure there will be no slippage when you tune them up. Plus they really do stay in tune. The 9-46 extra light string set is made for Rock & Roll. With a bare third string, they are easy to bend over and over again without going out of tune. Nickel plated steel has long been the standard in Rock & Roll guitar strings, and Power Wounds work fine on every electric guitar, with single coil or dual coil pickups. They make a Les Paul sound great. Why not try a set and see for yourself?