Woodtone Bluegrass Series Acoustic Guitar Strings are gauged halfway between lights and mediums. This set is also medium tension for extra tone and volume to cut through the mix at bluegrass jams. We designed these strings to have a warm and traditional tone for playing bluegrass music. This set of strings features a precision wound phosphor bronze wire that is drawn around a hexagonally shaped high-carbon steel core to maintain proper tension and balance across all strings. Each string is lightly coated to ensure maximum string life without sacrificing tone.