| CPC A63B 60/54 (2015.10) [A63B 53/047 (2013.01); A63B 53/0416 (2020.08); A63B 2102/32 (2015.10); A63B 2209/00 (2013.01)] | 12 Claims |

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9. A golf club head comprising:
a striking face;
a periphery portion surrounding and extending rearwards from said striking face;
a coordinate system centered at a center of gravity of said golf club head, said coordinate system comprising a y-axis extending vertically, perpendicular to a ground plane when said golf club head is in an address position at prescribed loft and lie, an x-axis perpendicular to said y-axis and parallel to the striking face, extending towards a toe of said golf club head, and a z-axis, perpendicular to said y-axis and said x-axis and extending through said striking face;
wherein said striking face comprises a front surface configured to strike a golf ball and a rear surface opposite said front surface;
a support arm spaced from said rear surface of said striking face, said support arm extending from said periphery portion;
a first damping element residing between said support arm and said rear surface of said striking face;
a second damping element located between said support arm and said striking face, said second damping element in contact with said rear surface of said striking face and said support arm;
wherein said periphery portion comprises a back portion which partially encloses an internal cavity formed between said striking face and said periphery portion;
wherein said support arm is spaced from said back portion;
wherein said second damping element is spaced from said back portion;
wherein said periphery portion comprises a sole extending rearwards from a bottom of said striking face, a topline extending rearwards from a top of said striking face, said toe, and a heel opposite said toe;
wherein said second damping element includes an open slit directly adjacent to said striking face; and
wherein said second damping element contacts a first surface of said support arm facing towards said striking face, a second surface of said support arm facing away from said striking face, a third surface of said support arm facing said toe, and a fourth surface of said support arm facing said heel.
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