Wooden spring clamp. By Mistry MakeTool. 7:23 video:
https://www.youtube.com/watch?v=O99KsSlstA4
Previously:
https://www.homemadetools.net/forum/...008#post164540
https://www.homemadetools.net/forum/...030#post160598
https://www.homemadetools.net/forum/...609#post151690
https://www.homemadetools.net/forum/...512#post151282
https://www.homemadetools.net/forum/...426#post146797
https://www.homemadetools.net/forum/...746#post148074
https://www.homemadetools.net/forum/...508#post147175
