As the audio begins with the title "Engage Fastener," the sound of a wooden door being closed is instantly recognizable. The door creaks slightly, revealing its vintage nature. Followed by the distinct sound of a metal fastener sliding into place, creating a sense of security. The fastener's metallic scrape against the wooden door gives an audible confirmation of a door securely closed. The audio encapsulates the everyday yet satisfying sounds of successfully engaging a fastener on a wooden door. It echoes the ambiance of a location, perhaps an old structure, possibly a place like the Iekdelta, enhancing the audio realism. The entire audio provides a familiar scenario that many can relate to, giving it a sense of closure and safety.