Kluson USA? 4 Piece Brass Or Steel Wheel And Post Set For Modern Or Vintage ABR-1 Tune-O-Matic BridgesThis is a plated replacement stud post and wheel set for Kluson? ABR-1 bridges. Kit includes both posts and either brass thumbwheels with the finer modern knurling or steel thumb wheels with the heavier vintage knurling on the edges. Made in the U.S.A.