| 摘要 |
<p>The tool for use with a punching press for punching holes in workpieces has an elongate body having first and second ends. The first end is for releasable engagement by the punching press and the second end has a working surface to engage the workpiece to be punched. The working surface comprises at least first and second punching edges formed on said second end of the body; and disposed in axially spaced relationship. The first punching edge is formed on the leading end of the second end of the body and the second punching edge having a dia. less than the dia. of the first punching edge.</p> |
