Authentic Floyd Rose hardened steel locking nut for Korean-made 1000 Series, 1000 Series Pro, Special, and Non-Fine Tuner Tremolo Systems. Needless to say, from the company that revolutionised the electric guitar with the invention of the world's first locking vibrato system in 1977, you can be assured the R3 Series ‘Special' Locking Nut ensures stable, rock-solid tuning that Floyd Rose are famous for. Looking cool, finished in black with black clamping screws, this precision engineered locking nut will also work with non-Floyd Rose and Licensed Floyd Rose Tremolo Systems, to offer exact and accurate return to pitch, after the most ferocious vibrato action, whilst also increasing sustain, warmth and clarity. If you don't know the nut size you need, please consult the nut sizing chart.