Retrofit your Japanese made Fender for drop tuning with our BT10 Xtender™ key.
Please note: the BT10 does not retrofit the Geddy Lee Jazz Bass (even though it is Japanese made). The BT2 retrofits the Geddy Lee bass.
Warning: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer. For more information go to