A golf club head comprising: a striking face ; a periphery portion surrounding and extending rearwards from said striking face, wherein the periphery portion comprises a sole extending rearwards from a bottom of said striking face and a topline extending rearwards from a top of 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 heel 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 ; wherein said support arm is affixed to said periphery portion at two distinct locations; a damping element residing between said support arm and said rear surface of said striking face ; wherein said damping element comprises a front surface in contact with said rear surface of said striking face and a rear surface in contact with said support arm; characterised in that said support arm comprises a first portion extending from said sole towards said damping element and a second portion extending from said topline towards said damping element ; wherein said first portion of said support arm has a first thickness along said z-axis and a first thickness along said x-axis, wherein said first thickness along said z-axis is greater than said first thickness along said x-axis; and wherein said second portion of said support arm has a second thickness along said x-axis and a second thickness along said z-axis, wherein said second thickness along said x-axis is greater than said second thickness along said z-axis. a striking face ; a periphery portion surrounding and extending rearwards from said striking face, wherein the periphery portion comprises a sole extending rearwards from a bottom of said striking face and a topline extending rearwards from a top of 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 heel 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 ; wherein said support arm is affixed to said periphery portion at two distinct locations; a damping element residing between said support arm and said rear surface of said striking face ; characterised in that said support arm comprises a first portion extending from said sole towards said damping element and a second portion extending from said topline towards said damping element ; wherein said first portion of said support arm has a first thickness along said z-axis and a first thickness along said x-axis, wherein said first thickness along said z-axis is greater than said first thickness along said x-axis; and wherein said second portion of said support arm has a second thickness along said x-axis and a second thickness along said z-axis, wherein said second thickness along said x-axis is greater than said second thickness along said z-axis. <EOS>