


Personnel report sounds of scraping stone originating from within the container when no one is present inside. In the event of an attack, personnel are to observe Class 4 hazardous object containment procedures. Object is reported to attack by snapping the neck at the base of the skull, or by strangulation. Personnel assigned to enter container are instructed to alert one another before blinking. Line of sight must not be broken at any time with SCP-173. The object cannot move while within a direct line of sight.

SCP-173 is animate and extremely hostile. It is constructed from concrete and rebar with traces of Krylon brand spray paint.
