SOLD Like New Hipshot BT3 Bass Extender Key D-tuner - Nickel. It was used for a short period on my Fender '57 RI P bass then stored in its original factory packaging. It comes with its instruction manual, mounting screws and original packaging. "Retrofit your pre-CBS Fender equipped with reverse winding Kluson tuning machines for drop tuning. Fits 11/16 headstock holes. Installation instructions and mounting hardware included." $45 includes FREE shipping to CONUS. Thanks for looking.