Barrel hoop driver.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...hoop_river.jpg
Previously:
https://www.homemadetools.net/forum/...3286#post98587
https://www.homemadetools.net/forum/...969#post102990
https://www.homemadetools.net/forum/...218#post115985
