Musiclily 42mm Guitar Metal String Lock Locking Nut for Tremolo Bridge Fender Stratocaster Electric Guitar Double Lock System, Black(Pack of 2) Fit for Strat/Squier electric guitar tremolo bridge. Length: 42mm; Width: 15.5mm String spacing: 35.5mm; Come with screws and wrench. Material: Metal;Color: Black Package Includes: 2Pcs Locking Nuts