Homemade ring roller. 19:52 video:
https://www.youtube.com/watch?v=izL8XHlI1r0
Previously:
https://www.homemadetools.net/forum/...822#post137091
https://www.homemadetools.net/forum/...141#post120912
https://www.homemadetools.net/forum/...2773#post97101
https://www.homemadetools.net/forum/...771#post140133