Bat'leth
The bat'leth is a long and curved ceremonial sword with handholds on the back. It was created by Star Trek: The Next Generation visual effects producer, Dan Curry, for the Star Trek television series. It is mainly used within Star Trek fiction by the Klingons, a race in the series. It is thought to be a highly noticed image of Star Trek and copies are widely available online as highly collected things and as a part of costumes. They have also been used in crimes.