With the Fender Precision to Jazz Bass Conversion Neck, you can combine the snug contours of a P-Bass with the comfortable feel of a J-Bass neck for the ultimate upgrade. Together with a modern C-profile, the twenty medium jumbo frets, 12-inch fretboard radius and satin-gloss finish of this high-end Fender bass neck make slinging melodies and nimble bass lines as easy as possible. Bolt it to the body of a Fender or Squier-made Precision Bass and fuse the best of two iconic basses into one.