Kluson KVDW-3-GM Waffleback 3+3 Metal Keystone Tuner Set - GoldThis top of the line tuner is known as the Waffleback and has been absent from the market for 40 years. Kluson is proud to reintroduce this tuner, which was used on numerous high end Gibson Les Pauls, ES 355, Super 400, L5 and early Les Paul SG Customs. Important Dimensions: Post diameter 1 4 in. (. 25 in.)Set screw distance (on center) 1 1 16 in. (1. 065 in.)Housing width 21 32 in. (. 65 in.)Housing length 1 23 64 in. (1. 35 in.)Ferrule O. D. 11 32