I bought these for my Gretsch Junior Jet II bass which has a bit of a neck dive.
The weight difference between the standard tuners and these is unbelievable, these weigh about half of the standard ones.
And while there's nothing wrong with the standard tuners, the Gotohs are really very high quality.
Of course tuners are only a very small fraction of the total weight of a bass, but as they are at the very end of a quite long lever, you can actually feel the difference. The neck dive on my Gretsch has become less prominent.
Beautifully made, high quality product.