Authentic Floyd Rose hardened steel locking nut for Korean-made 1000 Series, 1000 series Pro, Special, By Floyd Rose, and Non-Fine Tuner Tremolo Systems. Package comes with top-mounting screws, rear mounting screws, and washers.
If you don't know the nut size you need, please consult the nut sizing chart below:

For detailed specs, please see the drawings at the links below: