The Genuine Fender LSR roller nut fits American Deluxe guitars that have a HSS pickup configuration. They also fit the older Strat Plus guitars which is where this nut featured as standard. Includes an adapter for fitting to the Strat Plus model. Also includes all hardware to mount plus shims and instructions.Fender say:Brushed-chrome LSR roller nut assembly reduces friction that can cause tuning instability. For use on American Deluxe guitars with HSS pickup configuration; also fits older Strat Plus models with included Wilkinson© adapter. For string gauges from .008 to .056.ÿIncludes instructions, mounting hardware, shims and Wilkinson© adapter. Note that modification may be required for correct installation.