Featuring " Rock-Solid" posts and " Lubri-Plate" ( now enhanced with G.S.P ). G.S.P is polymer compound specifically formulated to work with GOTOH. Lubri-Plate process creating even less friction between the gears giving ultra smooth feel and longer life to the gears. This reduces the friction between the Gears resulting in an ultra smooth feel minimal back lash and unrivalled tuning stability for Vibrato equipped guitars.