A steel ruler and small screwdriver was scraped against each other to make it sound like something was sharpened. A zoom h6 recorder was used, using the xy capsule, in a garage.
A high quality shrill screech produced from large metal panels scratching against an old atx panel using it's edges. I imagine derelict buildings with steel slide doors being open slowly or a blade dragged on the ground.
Various knives being scraped against one another. Not the metallic "shing" associated with swords but a good metal scraping. There are several versions in this one file.