The Graph Tech PU-6520-00 Un-Lock nut provides you precision and stability for your Floyd Rose equipped guitar. With reimagined slots to accommodate unique string behavior and an exact radius match, you'll enjoy unparalleled accuracy in string height. The Un-Lock nut seamlessly integrates with your Floyd Rose bridge, requiring no modifications to your instrument. Its extended ramps distribute string stress evenly, infusing three times the self-lubrication for a frictionless glide that won't compromise nut slot integrity. This is the 16" radius version.