Fender Mex '56 Road Worn This bridge, originally from a Stratocaster, has the following parts replaced: * Inertia block replaced with a Callaham - Vintage S Model Assy Enhanced. * Bridge plate and inertia block mounting screws replaced with stainless steel screws. Features of this bridge: The arm hole has been modified, allowing for a snug fit with both Callaham arms and standard arms, eliminating any play during tremolo use. (See photos) Bridge mounting screw pitch - 11.3mm Saddle pitch - 11.3mm (This is the standard Fender Strat pitch, but please confirm the dimensions of your guitar before purchasing.) There are saddle screw marks on the bridge plate. Overall, there is a used feel. (No issues with functionality) As this is a relic-style bridge, some light rust was present. The red-boxed area has been cleaned of rust and repainted silver. (Photo 9) It's barely noticeable, but visible under close inspection with a light. Please understand that this is a used item before purchasing.