CARLSBAD, Calif., Dec. 17, 2012 /PRNewswire/ -- Callaway Golf Company (NYSE: ELY) today announced its X Hot™ and X Hot™ Pro Irons. Long-renowned for its best-selling and accurate irons, Callaway's award-winning Research and Development department set out to deliver measurable distance gains with these two new, aggressive irons. Available to golfers on January 25, 2013, the X Hot and X Hot Pro Irons have distinctly different technologies that fuel distance and complete performance for both amateur and professional golfers. In its pursuit of distance gains, Callaway incorporated a Deep Undercut Cavity Design and its powerful Speed Frame™ Face Technology to strike a balance of high ball speeds and great feel. The deep undercut design allowed Callaway to precisely position the Center of Gravity (CG) and move the most compliant part of the face – the hottest part – lower, where more golfers make contact with the ball. Callaway also, for the first time, incorporated Speed Frame Face Technology from its drivers into the X Hot Irons. Doing so optimizes stiffness across the face for more efficient energy transfer. This produces more ball speed and consistent distance, even on off-center contact. Relative to its predecessor, player testing resulted in an increase in ball speed and distance gains through the set. "The X Hot Irons have been meticulously engineered – both in terms of physical characteristics and club configuration – to increase ball speed and promote overall distance optimization," said Dr. Alan Hocknell, SVP, Research & Development, Callaway Golf. "And in doing so I think we have raised the bar and created the standard in distance for the irons category. Golfers will very much enjoy the results." Rounding out the X Hot Irons is the Feel Management Technology, a dual material medallion that fine tunes sound by promoting a crisp, dynamic feel at higher ball speeds. The stock shaft offering is a True Temper Speed Step 85 Lightweight Steel Shaft.