The cobra king f6 fairway woods use technology to maximise distance and ball speed these fairway wood use an adjustable front to back centre of gravity setting to optimise your trajectory and forgiveness the clubhead is constructed using a 475 stainless steel face insert with a speed channel and myfly8 with smartpad technology so you can fine tune eight loft positions as well as two centre of gravity positions with a 20 gram and 3 gram moveable weights