| 摘要 |
<p>A socket wrench produced in a progressive die from a metal sheet, with a bent area and two straight sections, one longer (2) and one shorter (3). The sheet metal meets along an edge (11) provided with recesses and projections (8, 8a) which engage with each other, and the end of the shorter section (3) has a hexagonal cross-section. The shorter section (3) is occupied by an electrode welded section (10). A sturdy economical wrench is thus provided. <IMAGE></p> |
