King f7 hybrid blackthe f7 hybrid is our first hybrid with rails technology for ultimate forgiveness features adjustable lofts to optimize distancenew baffler rail technology a smoother progressive rail design that provides forgiveness from any liebaffler dual rail systemprogressive rail design provides shallower or steeper rails depending on club loft and angle of attack for improved turf interaction and consistency from every lieback cg position with changeable fixed weighta single fix