Underwater weed cutter.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...ass_cutter.jpg
Previously:
https://www.homemadetools.net/forum/...296#post196215
https://www.homemadetools.net/forum/...591#post189724
https://www.homemadetools.net/forum/...539#post132320
https://www.homemadetools.net/forum/...384#post161857
https://www.homemadetools.net/forum/...810#post186694