Akatsuki Ring

A ring worn by members of Akatsuki. Once the ring is slipped on, it becomes sealed to the finger it is upon. The only way to remove it, is to know the specific sealing jutsu used on it. Or alternatively, cut off the finger it is on.

The rings bear other certain seals within them as well, giving them certain abilities.
 * It allows users to reverse summon themselves back to their headquarters within the Tower of Pain. Certain higher-ups may summon other members to them as well.
 * Members may communicate and call upon each other.
 * An Explosive Seal may be placed on surfaces which the ring touches, upon the user's discretion. This does not mean that the user knows the technique itself, but rather, only have the knowledge of knowing how to place and activate it.