It's safe to describe Jack White's Triplecaster as “ever-evolving”. Now, the Triplecaster is evolving even further, with White himself unveiling a freshly baked semi-hollow Thinline version on social media, requested specifically by Kirk Hammett. “Notice something different about this here Fender Triplecaster that the Detroit style guitar slinger Olivia Jean is riffing on?” writes White. “This was dropped off to me yesterday by the Fender Custom Shop in Nashville. A post shared by Jack White (@officialjackwhite) A photo posted by on“So all that was needed at the custom shop was to get the patterns out for the F hole and voila.