You may want to take a look at the Taylormade RBZ Irons. The idea behind these irons was to put all the technology they possibly could for an iron, regardless of cost. So, instead of having the metal wood construction in just the 3-5, the RocketBallz irons employs metalwood construction in every irons. The face created separately from the hollow body allows the face to be unsupported (lacking braces or crosspieces behind it that could inhibit flex) and exceptionally thin, making it very fast in how it flexes and reflexes at impact.
Key to the improved accuracy of Taylormade Rocketballz Irons are the new "Toe-Bar" feature, positioned in the upper toe, and the new design of the Inverted Cone. Fast-faced irons suffer in terms of accuracy because the asymmetrical shape of an iron face naturally causes the flex-point of the face to direct the ball off-line. The Toe-Bar and redesigned Inverted Cone together stiffen the toe-area of the clubface so that when the face flexes it directs the ball straight forward.
TaylorMade Golf, today introduced Rocketballz Irons, a progressive and dynamic set engineered to deliver effortless distance and a higher and straighter ball flight. This winning combination of distance and accuracy makes the new RBZ iron a game-changer and positions to be one of the greatest iron sets in company history.
Essential to the distance performance of Clone Taylomade irons are actually a big, thin clubface that's sturdy and stiff at the perimeter and thin in the inner edge, allowing the face to flex freely like a trampoline. No element from the clubhead structure inhibits or restricts the flexion from the face. RocketBallz also incorporate TaylorMade's Inverted Cone clubface technologies, which expands the portion from the face that delivers high ball speed, promoting more distance on off-center hits.