| 摘要 |
PROBLEM TO BE SOLVED: To provide sporting goods allowing more than one of kick points to be made without decrease in shaft strength and having excellent in appearance. SOLUTION: Each of the sporting goods has a shaft with a hollow part and a hollow expanded part at a position near the edge of the shaft. The method for manufacturing each of the sporting goods comprises forming the hollow part by partially filling the hollow expanded part of the shaft previously, largely formed except positions of the kick points. |
