This restoration is on a Harvey Manufacturing Corp. Butterfly filing machine from the 1950s-1960s. Also known as a die filer, or its proper pronunciation "defiler", this tool perfectly and quickly moves a file up and down to rapidly remove material. The one I have also has a scroll saw attachment. I actually used this tool in a previous video, but it kept seizing on me every time I would shut it off and would need a giant wrench to get it moving again. The annoying seizing became too much for me so I decided to restore this machine and fix the problem.