Pyeongon
The Pyeongon is a nunchaku/Flail-like weapon used by the Joseon army and is first mentioned in a martial arts manual called Muyesinbo. The weapon was inspired by the farmer's flail to thresh rice with. In the West it mostly known as a two-section staff.
The Pyeongon consists of a large pole with a shorter stick attached to it by a metal chain, but sometimes rope was used. The short stick could be covered with spikes.