The suicide ring

Item #: SCP-XXXX

Object Class: Safe

Special Containment Procedures: SCP-XXXX is to be kept in an airtight, soundproof 20cm by 20cm locked steel briefcase which is to be kept in any general storage area. Access to SCP-XXXX is forbidden for any other reason than recherche on D-call personnel. SCP-XXXX is not allowed to be given to any other SCP and testing of SCP-XXXX on other SCP is strictly forbidden

Description: SCP-XXXX is a small silver ring 2cm tall and 8cm in circumference with the center hole 3.5cm in diameter. the ring was originally discovered completely intact but due to testing, the ring has received small scratches and a small 0.6cm dent caused by a hammer. After weeks of testing we have concluded that wearing SCP-XXXX will immediately cause the wearer to try everything within physical boundaries to kill oneself. All test conducted on SCP-XXXX have been using D-class personnel.
results of wearing SCP-XXXX have concluded in the subject hitting his head into the test chamber door until death by blood loss, subject choking himself with bare hands, subject biting off bits of his flesh with his own teeth. One of the D-class subjects seemed to keep his consciousness even after wearing SCP-XXXX. This subject became immediately extremely violent and attempted to remove the ring. Seconds after removing SCP-XXXX from his finger the subject died of cardiac arrest. Since that event only 2 other subjects have tried to remove SCP-XXXX from their finger. These events went as follows: In the first situation the subject tried to use multiple given tools to destroy the ring. The subject hit SCP-XXXX 7 times with a 1.5kg construction hammer which only dented it. These actions caused the subject do die of cardiac arrest. In the second situation the subject started behaving irrationally and started repeatedly punching the test chamber wall with the hand SCP-XXXX was attached to. After 129 punches the subject died due to unknown reasons. SCP-XXXX was not damaged by these actions.
SCP-XXXX was dicovered on the corpse of ██████ ██████ in the town of ████ in █████ from which SCP-XXXX was taken into police custody where officer ███ █████ was found dead wearing the ring. Because of these events the ring ended up in the possession of agent ██████ who sent it to be analysed at site 19.