Per 
Item #: SCP-5104
Object Class: Safe
Special Containment Procedures: SCP 5104 is to be kept on a steel podium, 2 metres from the ground, in a locked containment chamber. No personal are allowed to enter the chamber without clearance
Description: SCP-5104 is a United States Marine Core (USMC) M1 Pot helmet originating from the Pacific Theatre of the Second World War.
When SCP 5104 is placed on the head of anyone, it cannot be removed until the wearer is dead. The helmet seems to reprogram the users mind, it is unknown specifically what the user is reprogrammed to do as it effects people differently. Some test subjects have become violent and attempted murder, others have become docile and stop moving. But one thing is in common, all test subjects die after SCP 5104 has been placed on their head.
