Kant twist clamps. By Just1Guy Metalworks.
33:15 video:
https://www.youtube.com/watch?v=JkieOypxJYA
30:00 video:
https://www.youtube.com/watch?v=AprpelLhomA
Previously:
21 plans for homemade clamps
https://www.homemadetools.net/forum/...038#post179980
https://www.homemadetools.net/forum/...723#post152046
