When it comes to the Titleist AP2 712 Irons 2012, which are designed for low handicappers, McGinley says Titleist has significantly increased the club's moment of inertia (MOI) by re-positioning tungsten weight within the heads.

"The overall goal was to better apply the different materials we use in the design," McGinley said. "To make both the AP1 Irons and AP2, in essence, more forgiving. But when you are talking about the AP2 player, he's not really looking for forgiveness. For him, iron play is all about distance control. When we can make an iron more forgiving, we're really giving the AP2 player more consistent ball speed over a larger area of the face."

McGinley said that a player who owns 710 CB or MB irons won't feel much difference if he tries the new Titleist AP2 712 Irons 2012 or 712 CB, and that's by design. The pros who use the clubs--like Rory McIlroy, Geoff Ogilvy and Rickie Fowler--give the company lots of good feedback on them, so Titleist doesn't want to tweak these classic forged blades too much, McGinley said.