Push graver. By Uri Tuchman. 12:38 video:
https://www.youtube.com/watch?v=Y2LXM6qWPvs
Previously:
https://www.homemadetools.net/forum/...408#post158386
https://www.homemadetools.net/forum/...689#post143603
https://www.homemadetools.net/forum/...692#post147827
https://www.homemadetools.net/forum/...437#post146850
