US Patent 7959522 Golf driver head with exchangeable rear sections

A golf driver kit includes a front portion and a plurality of rear portions exchangeably connectable to the front portion and being of different respective shapes for imparting different flight characteristics to a struck golf ball. The front portion includes a front face plate and a hosel for receiving a shaft, plus a rearwardly projecting base on which the rear portion is seated. The rear portion is removably attached to the front portion by screws.