The Graph Tech PU-6519-00 Un-Lock Nut upgrades your electric guitar equipped with a Floyd Rose locking nut. With an advanced slot design, the Un-Lock Nut's reimagined slots perfectly accommodate each string on your Floyd Rose bridge for precision and stability. This is the 12" radius version. Crafted from black TUSQ XL, the Un-Lock nut allows for individual string height adjustment so you can customize action for your playing style. The extended ramps also distribute string stress more evenly for a friction-free glide. Designed specifically for Floyd Rose bridges and locking nuts, the Un-Lock nut integrates seamlessly with your guitar. Installing the Un-Lock nut is straightforward—just sand the ends for a flush fit and use a bit of white wood glue. No guitar modifications needed.