The Pro model features all the important details a better golfer covets in a modern day iron. While this model is still considered a game-improvement design from the undercut cavity to the enhanced heel-toe weighting, the XK Pro has the reduced offset, more compact blade length, beveled sole and thinner topline preferred by better golfers. The elongated hosel length is there to control the trajectory and allow the golfer to work the ball when needed...everything the better golfer expects out of a premium club and perhaps more! Manufactured of 431 stainless steel.