Seishin no Kabushiki

 Seishin no Kabushiki  (精神の株式; lit. spirit stake) is a tool developed by Glas of the Kyuushoku to stop the flow of the  Kōryū .

Appearance
Seishin no Kabushiki look like round, black poles. They're approximately three feet in length and half a centimeter in diameter, although they're far more durable than one might expect. A coloured strip runs down on either side of the pole, and it's colour determines how much reiatsu is left within the tool. If the strip is blue, it is more than half full. If it's yellow, it's half full, and if it's red, it's only a quarter-full.

Usage
Anyone can use a Seishin no Kabushiki; the user's race doesn't impact how well it works at all. All one has to do is pour their reiatsu into the pole, and then position it in the Kōryū. Each rod can affect currents that are within a five-foot radius, and as such, several of them are often needed in order to effectively halt any kind of movement.

History
Before the creation of the Seishin no Kabushiki, the Kaisou were forced to manually stop the current using the same methods that the Shinigami did. This was highly innefective for what they needed, and many tried and failed to develop a better technique. Building upon failed attempts, Glas managed to succesfully create the first Seishin no Kabushiki after several attempts. He would later go on to refine and mass-produce his invention, which had an incredibly positive impact on the Kaisou as a whole.