Patent ID: 8585514

Claim:
A golf club head system comprising: a main body member having a striking surface, a frame extending around the striking surface and a shaft attachment region; a first secondary body member detachably attached to the main body member, the first secondary body member and the main body member forming a golf club head and defining an at least substantially enclosed cavity therebetween; and at least one other secondary body member attachably interchangeable with the first secondary body member, wherein each secondary body member has a different external shape configured to impart a different external shape to the golf club head, wherein the main body member includes a crown portion that extends rearwardly over a majority of a front-to-back dimension of the golf club head, wherein the main body member includes a rearwardly extending sole portion, and wherein the first secondary body member has a sidewall projecting forwardly from a rear wall portion, wherein the forwardly projecting sidewall is configured to extend between the rearwardly extending crown portion of the main body member and the rearwardly extending sole portion of the main body member.