"The Sophia tremolo’s design is such a vast improvement over previous systems that it’s an understatement to call it the most significant tremolo system upgrade introduced since the Floyd Rose." Guitar World
The Sophia HeadPeace Micro and HeadPeace Tuner feature a removable nut in traditional dimensions to retro-fit an OFR®-style locking nut.
The Micro has essentially the same dimensions of the traditional locking nut — about 43mm wide x .600 secured with the traditional back-of-the neck 2 x M4 screws @ 14mm apart…
Removable Nut -- R12, R16, R20
Individual string locks
Fits vintage locking nut shelf dimensions and 2 M4 x 14mm screw pattern