摘要 |
<p>PROBLEM TO BE SOLVED: To provide a golf club head capable of producing a comfortable hitting sound. SOLUTION: The metal golf club head 1 has a face part 2 for hitting a ball and a hollow part (i) inside. At least one recessed groove 10 is formed on the inner surface 2i of the face part 2 facing the hollow part (i). The width of the recessed groove 10 is 0.15-1.5 mm and the depth of the groove is 0.15-1.0 mm.</p> |