The RAZR X Black features the Callaway''s RAZR Technology. The center of gravity is lower in this model than in any other Callaway stainless steel iron. This provides the playability of a wide sole iron while retaining the workability of a thin sole iron. The VFT Power System precisely positions the Center of Gravity and creates a face on each iron that maximizes ball speed. The Black PVD Finish produces a distinctive stealth look for reduced glare and strong appeal in the bag.