Rivets tool in steel ship building. Mounted on chains for demonstration purposes. Photographed at Industriemuseum Elmshorn, Schleswig-Holstein, Germany
<a href="//commons.wikimedia.org/wiki/User:Bullenw%C3%A4chter" title="User:Bullenwächter">Bullenwächter</a>
<span class="int-own-work" lang="en">Own work</span>