| 摘要 |
A golf club head (2) is characterized by stepped grooves (12) in the striking face (10) thereof. The serrated grooves (12) are defined by opposed side walls (16 and 18) each having at least one step portion (16a, 16b, 18a or 18b) intermediate the length thereof. The stepped grooves (12) impart more consistent spin to a golf ball when struck by the club head (2). |
