Kluson has introduces the new E-mount tuning machines to its Revolution series lineup. With a 20:1 gear ratio, Kluson now offers a die-cast Revolution series tuning machine for post-1960s instruments. These tuning machines are available in both non-locking and locking formats. This new Kluson design incorporates today’s 10-millimeter peghole sizing to accommodate the collar of the housing and screw in bushing, while utilizing a single mounting screw located at 6 o’clock low on the rear housing. Kluson Revolution E-mount tuners come standard with the kidney bean-shaped button, so in the case of upgrading or refurbishing an instrument, players can maintain the same look from the front while upgrading performance and appearance.