To replace USA and Schaller Nashville body bushings/anchors use the Faber iNsert Kit. To replace large Epiphone/Gotoh/etc. style body bushings/anchors use the Faber E-Sert Kit. The bridge is milled from a solid block of brass for superior quality and tone and the brass saddles are reversible to give extra intonation room on the bass strings to compensate for the narrower ABR-1 body width (three reversed saddles installed as standard).