This terminal is used for <a href="https://en.wikipedia.org/wiki/circuit_breaker" class="extiw" title="en:circuit breaker">breakers</a> connection in <a href="https://en.wikipedia.org/wiki/distribution_board" class="extiw" title="en:distribution board">distribution board</a> (<a href="https://en.wikipedia.org/wiki/Copper" class="extiw" title="en:Copper">Copper</a> 10mm)
<a href="//commons.wikimedia.org/wiki/User:Dmitry_G" title="User:Dmitry G">Dmitry G</a>
<span class="int-own-work" lang="en">Own work</span>