Hipshot Ultralight Bass Guitar Tuner Set - 4 Black Tuners - 3/8" Post Size - 2 Bass Side + 2 Treble Side Ultralite tuners will lighten your headstock and help to balance out the weight of your bass. Machine crafted aluminum gives the Ultralight Tuners a high ruggedness and durability. 20:1 gear ratio provides very quick and accurate tuning of your bass. Comes with mounting screws. Set of 4 tuners (CONFIGURED 2 BASS+ 2 TREBLE) with "Y" shaped key in black finish.