The Hipshot GB7 Xtender allows you to instantly drop the tuning of your bass' low string and then back again with the flip of a lever. The GB7 is a direct replacement for Gotoh GB707 bass tuners (and also Gotoh GB350 Res-o-lite tuners however the tuner included with the GB7 is a Gotoh GB707 not a GB350). The lever can drop a major 2nd (E down to D) and if your strings have standard thickness cores you can go as low as a 4th (E down to B). The tuner itself features a 1:20 gear ratio for tuning up quickly and accurately. The 'Rock-Solid' string post improves the tuning stability of the tuner and stays strong during bending and tremolo use, special elastic parts eliminate any rattle in the post and transmission of string vibration to the instrument is maximised. The tuners are completely sealed and permanently lubricated through Gotoh's 'Lubri-Coat' technology, a coating applied to the worm gear to ensure better contact between the worm and spur gear wheel, backlash is minimised and durability is increased. Please note the tuner included has a different shape tuner button to the Gotoh GB707 tuners we stock as separate items.