Vise-grip C-clamp. By Rescatando Chatarra. 54-second video
https://www.youtube.com/watch?v=UKk1K50eFUA
Previously:
https://www.homemadetools.net/forum/...085#post164896
https://www.homemadetools.net/forum/...021#post140843
https://www.homemadetools.net/forum/...264#post116146
