The Thumb Half-Rail (Bridge Half in this case) is a long thumb rest for a bass guitar that runs the length of the right hand playing surface (between the pickup(s) and the bridge) allowing for wide range of tone variation with a comfortable and familiar hand position. This eliminates the tone-limiting "thumb on the pickup" locations or hand stretching to get where you want to be to get the right tone and attack. Just play.
Secures at a standard pick guard screw location using your existing screw, making it an easily reversible update to your bass.
This unit is designed specifically for the Fender Geddy Lee Artist Series Jazz Bass and assumes the use of a standard thickness pickguard (notice the indent on the back to accommodate the height change between the pickups). It may fit others, but has only been tested on the Geddy Lee model. Other Thumb Rail versions are being developed specific to other model basses as well. Be sure to check the whole store.
The Half Rail is available in both NON-Polished and Polished plastics and Alumide. Non-polished has a textured surface which ads some grip keeping your thumb in place nicely. If you prefer a smooth surface, order "Polished Strong & Flexible"...available in colors too.