XL Half Rounds bass strings are an excellent medium between round wound and flat wound strings. Half Rounds have a smoother feel than round wound strings, but a fuller tone than strings that are flat wound. Made with a high carbon steel core and pure nickel wrap wire, they’re finished with a precision grinding process to provide a smooth feel and reduced finger noise, with tone that's comparable to round wound bass strings. This 50-105 Medium set has a higher tension, affording increased low-end response and output.