Nike Golf Slingshot 4D  Iron Set with Steel Shafts:

 

The Nike Slingshot 4D irons add progressive change to four critical areas of performance to create irons that play how you need them to, when you need them to.

 

 

• Slingback: Design positioned weight stategically (low and back in long irons; higher and forward in short irons) in each club to achieve the desired ball flight
• Variable Sole Width: Sole width narrows progressvely throughout the set — long irons are wider for higher launch; short irons are thinner to provide greater control
• Progressive Offset: Offset in the long irons make it easier to square the face and hit high, straight shots. Incremental decreases in the mid and short irons ensure precise shot-making with the scoring clubs
• Club Head Profile: The long irons offer hybrid-like forgiveness and high, soft-landing shots — the mid-size profile of the short irons enhances control and accuracy