Bar clamp. By Ohyo56. 10:09 video:
https://www.youtube.com/watch?v=Vp-DifYLkJ8
Previously:
https://www.homemadetools.net/forum/...744#post170867
https://www.homemadetools.net/forum/...997#post164503
https://www.homemadetools.net/forum/...237#post154020
