BASS GUITAR STRINGS FLAT WOUND/ROUND WOUND MEDIUM LIGHT: .046 .063 .080 .102 The Fretmasters are a very innovative combination of roundwound and flatwound and, as far as we know, the only set of its kind! Made with stainless steel windings, the Fretmasters boast round windings over the pickups for the best, brightest, richest tone. But they're only round wound over the pickups. The windings over the frets burnished --- ground and polished to a smoother surface in order to help cut back on fret and neck wear. The end result is they feel like flat wounds but sound like round wounds! DM-2644$22.88