Electric Guitar String Lock Nut 42mm Replacement for Floyd Rose Tremolo Parts.* Excellent value accessories, this is a string locking nut complete with mounting screws and a valid Allen key.* It appears to be a standard size for an electric guitar, it can be used with a double locking system on the Floyd Rose.* For Strat for Squier tremolo bridge for electric guitar.* With a mounting screw and wrench. Specifications:Color: Chrome, Gold, Black (as shown)Material: Metal Length: 42mm; Width: 15.5mmPackage Included:1 X Lock Nut2 X Screws1 X Allen WrenchNote:Please refer to the measurement. A small measurement error is acceptable within the normal range. There may be a slight color difference due to monitor, camera or other factors, please refer to the physical item.