200mm Round Singlecut secondcut file with a slightly tapered end.
Video-How to use a file: https://youtu.be/1iKwP6A1Mss
Video-How to use and select files for metalworking: https://youtu.be/lOR2UwZRBws
Article-Types of Files: https://www.kmstools.com/blog/hand-file-identification/