Some players, including Eddie Van Halen, prefer to instead have a "half-floating" bridge, which allows only downwards motion. This means the cavity of the tremolo pocket is not fully milled away underneath—and if the tension of the rear springs is slightly stronger than the tension of the strings, the tremolo always rests flush with the body. In this set-up, a broken string has no effect on the pitch of the other strings, as the reduced overall string tension from the broken string doesn't make the bridge move, since it already presses against the body of the guitar. This also allows fitting a device to the bridge that can drop the low E-string down to D to extend the tonal variety of the guitar, even during live performance.