I’d be a little leary about using a file. Some can be pretty brittle and might snap in half when too much pressure is exerted. I know you would never use that much pressure on an oil filter, But I don’t know a thing about these sprockets. My knuckles get scuffed enough without breaking a tool.
My brand of rasps that I use on horses feet are very brittle and one broke, just dropping it on the concrete. I think in the 35 + years I’ve broken 5-6 of them.
Maybe this chainwhip tool is what I needed years ago when my brother in law tightened a filter so bad the seal popped out. I couldn’t get anything to grip that filter tight enough to spin it.
I made him take off so many parts (a few extras to teach a lesson), just so I could drive a big screwdriver thru it and looswen it.