ELECTRIC GUITAR STRINGS HALF-ROUND (ROLLER WOUND) MEDIUM: .011 .015 .018 .026w .036 .050 GHS Nickel Rockers are a unique set of strings with great tone and a smooth, comfortable feel with less finger noise. That's because the Nickel Rockers are made with a pure nickel wrap wire that is slightly flattened by rollers in the winding process. The resulting half-round winding is smoother for effortless sliding and less squeak. For original rock and roll and the warm tones of blues and jazz, Nickel Rockers just can't be beat. GHS-RPLUSRM$4.96 Click here for more information on Half Round windings.