Many of the classic rock sounds of the '70s and '80s came from this pickup. It's been integral to the sound of DiMeola, Gambale, Vinnie Moore, and Frehley. Hot output and mid-boost get maximum scream out of your amp. 4-conductor versatility with coil-splitting capability. Regular or F-spacing.Regular spacing (1.90" 1st-to-6th) is for vintage Gibson guitars. F-spacing (2.01" 1-st-to-6th) is for most Fender guitars, modern Gibson, and guitars with Floyd Rose bridges.