Cobra Men's Fly Z Hybrid Clubs, Green Speed Channel Face: An engineered trench around the perimeter of the face thins the wall structure around the perimeter to increase Speed Crown Zone Weighting Technology removes weight from the crown to reposition low and back in the head for a Low deep CG Forged E9 Zone Face Structure removes weight from key areas around the face and hosel areas to increase the size and speed of the sweet zone for more speed on off center hits MyFly8 Technology: 8 different Loft/Trajectory Settings SmartPad Technology delivers a square face at address regardless of loft setting