With the invention of the world's first locking vibrato system in 1977, Floyd D. Rose completely revolutionised the electric guitar, and with it a whole new generation of players. 40 years later Floyd Rose offers a vast array of replacement vibrato systems, upgrades and spares, and are used and trusted by some of the most influential and famous guitar players on the planet. Authentic locking nut for German-made Original and Pro Tremolo Systems. Width 42.85mm; Radius 10"