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 2.00 wide x .600 secured with the traditional 2 x M4 screws…
Removable Nut -- R12, R16, R20
Individual string locks
Fits vintage locking nut shelf dimensions and 2 M4 x 14mm screw pattern