| 摘要 |
<p>A head 2 has a face 4. The face 4 has a plurality of score line grooves 8 and a plurality of fine grooves 10. A depth of fine groove 10 is less than 0.03 mm. A width of the fine groove 10 is 0.1 mm or greater and 0.3 mm or less. A pitch of the fine groove 10 is 0.3 mm or greater and 0.8 mm or less. The fine groove 10 has a first direction extending part d1 extending in a first direction and a second direction extending part d2 extending in a second direction. The first direction is a direction directed to a top blade side toward a heel side. The second direction is a direction directed to the top blade side toward a toe side. The score line groove 8 and the fine groove 10 do not cross each other.</p> |
