GIBSON Vintage Gold Machine Heads withPearloid Buttons Genuine PMMH-020 REAL
GIBSON Vintage Gold Machine Heads w/Pearloid Buttons Genuine PMMH-020 "GENUINE REAL DEAL". Brand New and Factory Sealed. (READ) Each mounting ring has a flat (non-arched) bottom, and must be trimmed or sanded to match an arched guitar top.
Rings can also be lightly screwed down and tightened more and more over a period of time - they will flex a little bit. See detailed video to custom shape your pick-up rings to match your arched top.