Homemade brass utility knife. By Pask Makes. 14:38 video:
https://www.youtube.com/watch?v=IBXmuM5S2cg
Previously:
https://www.homemadetools.net/forum/...731#post147996
https://www.homemadetools.net/forum/...917#post144635
https://www.homemadetools.net/forum/...437#post146850
https://www.homemadetools.net/forum/...200#post141707