Nike VR Pro Combo CB Irons. Change for the better. Change from pocket cavity, to split cavity to blades throughout the set for the optimal shot. Change to a new forging process for more precise shot-making. And change to the new X3X high-frequency grooves for better performance and more consistent distance control. Want even more change? How about to your score. Right Club, Right Distance: VR Pro Pocket Cavity (4 and 5-irons) – More forgiveness on longer shots. VR Pro Split Cavity (6 to PW) – Enhances pin-seeking control and workability.