Tremolo Arm 6mm Diameter (Various Colour Tips). Top quality. This tremolo will fit many guitars with an original 6mm trem arm fitting. Not sure, try a 6mm screw in the block and see it it works. If not, try a 5mm as many guitar tremolos had 5mm diameter fittings. Comes in a range of finish options and either a plain, black or white trem tip.