Callaway STEELHEAD X-14 Iron Set

Features and Benefits of the Callaway X-14 irons:

First iron to feature Callaway's Variable Face Thickness (VFT) Technology.
VFT Technology allows Callaway's designers to adjust the thickness and raise
or lower the centre of gravity for optimum trajectory with each iron.
Higher launch angle in the long irons and better control and increased backspin
in the short irons and wedges.
Callaway Steelhead X-14s were the quickest selling irons in the history
of golf - and they are still very popular.