Gotoh FGR-2 C Floyd Rose Locking Nut 1-5/8"(R2) 41mm width Top mount Chrome plated Base measures 1-5/8" (41mm) x 19/32" (15mm) String spread is 1-11/32" (34mm) Nut mounting holes are spaced 17/32" (14mm) String tree mounting holes are spaced 1-1/8" (28.5mm) The Gotoh FGR-2 includes lock nut assembly with mounting hardware, string tree, 2.5mm and 3mm allen keys, and height adjust shims. Will fit guitars equipped with "bullet" style truss rod nut.