Callaway X Hot "Phrankenwood" (8.5 degrees, 45 inches, 250cc)

“Looking for a club with the same workability characteristics and face technology as 3Deep, in driver length (45 inches) and loft (8.5 degrees), to take advantage of additional rollout on tee shots at 9, 10 and 15, in particular, Callaway's R&D department created a smaller-headed driver for Mickelson dubbed "Phrankenwood."”

“Phrankenwood first comes to mind — a custom driver that was designed specifically for the 2013 Masters in an extremely tight time window.”