Patent ID: 8277337

Claim:
An iron head comprising: a striking face; a backside surface; a sole surface; a hosel; a recess portion provided in an upper portion of the backside surface, said recess portion having a first length in a vertical direction in parallel to the striking face; a protruding portion provided at a lower portion of the backside surface and projecting backward, said protruding portion having a second length greater than the first length in the vertical direction, said protruding portion having an upper surface curved upwardly; a first hollow portion provided on a heel side of the protruding portion; and a second hollow portion disposed on a toe side and inside the protruding portion, said protruding portion including a middle portion between the first hollow portion and the second hollow portion, wherein said striking face includes a plurality of score lines including a longest score line, said middle portion being disposed so that a center line of the middle portion is aligned with a center line of the longest score line.