Floyd Rose FRTS3100R2 Special Series Tremolo System with R2 Locking Nut, Rose Gold (FRTS3100R2)
Amazon.com: Musiclily 42mm Metal Guitar String Locking Nut for Floyd Rose Style Electric Guitar Tremolo Bridge Lock System, Black : Musical Instruments
Floyd Rose FRNR4CP Locking Nut R4 for Original Tremolo Systems, Chrome