Cobra FLY Z XL Iron Set Steel Stiff Flex Shafts 4-GW Right Handed. The oversized yet traditionally shaped Fly-Z XL Irons are designed to give golfers confidence at address and deliver easy distance through consistently higher trajectories. The dual hollow cavity design allows for a deeper, lower CG which delivers easy up and easy distance. In addition, the hollow construction allows for a thinner face which, along with the Speed Channel, delivers additional ball speed, incredible distance and saves weight. The progressive offset design helps to create easy draw. Stock Set is 8 Clubs (4,5,6,7,8,9,PW,GW). Long and mid-irons (4-8) feature a dual cavity design with a hollow lower half section that delivers a lower and deeper Center of Gravity meaning you get easy launch with extreme forgiveness in every shot. The scoring irons (9 - GW) feature a deep Perimeter Undercut where weight has been removed from the back of the entire face area to create a large unsupported face, meaning you benefit from forgiveness and accuracy in every shot.