Product details:

This is the only roller bridge that matches the 12 inch radius of the Nashville Tune-O-Matic. Low-friction brass roller saddles let the strings move freely and return to accurate pitch. This is the only roller bridge that matches the 12 inch radius of the Nashville, so you maintain the string action you're used to. - Thumbwheel height-adjustment studs and knurled bushings are included. - Specs: String spread: 2-1/16 inch - Saddle radius: 12 inch - Stud spacing: 2-29/32 inch - Stud threads: M5 x .8About bridge & tailpiece measurements: String spread is the distance between the centers of the outer strings on a bridge or tailpiece. - Saddle radius determines the arc formed by all the individual saddle heights, and is similar to the measurement of a fretboard. - Stud/post spacing is the distance between the centers of the mounting posts of a bridge or 'stop' tailpiece. - Bridge is made of chrome-plated zinc, with brass rollers.