A <a href="https://en.wikipedia.org/wiki/sheet_bend" class="extiw" title="en:sheet bend">sheet bend</a>.
<a href="//commons.wikimedia.org/wiki/User:Markus_B%C3%A4rlocher" title="User:Markus Bärlocher">Markus Bärlocher</a>
2008-03-09
<span class="int-own-work" lang="en">Own work</span>