Patent ID: 8876627

Claim:
A golf club head comprising: a body comprising a striking face, a crown, a sole, and a hosel, with the hosel defining a hosel opening, an annular shoulder, and an upper bearing surface, and the sole defining an opening that is in communication with the hosel opening and an internal bearing surface; an adjustable head-shaft connection system configured to allow the golf club head to be adjustably attachable to a golf club shaft in a plurality of different positions wherein a longitudinal center axis of the hosel is offset from a longitudinal center axis of the shaft, with the adjustable head-shaft connection system having a sleeve with an upper portion engaging the upper bearing surface of the hosel and a threaded lower opening, and a screw extending through the opening in the sole and having a head defining a bearing surface engaging the internal bearing surface of the body and a threaded region engaging the threaded lower opening of the sleeve; and a hosel insert secured inside the hosel and contacting the annular shoulder, the hosel insert of a height dimension less than a height dimension of the hosel including a rotation prevention portion configured to mate with a rotation prevention portion of the adjustable head-shaft connection system; wherein the center of gravity of the golf club head has a Z-axis coordinate of less than or equal to about 0 mm.