Tree bark thickness gauge.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...epth_gauge.jpg
Previously:
https://www.homemadetools.net/forum/...743#post159676
https://www.homemadetools.net/forum/...179#post172530
https://www.homemadetools.net/forum/...597#post166880
https://www.homemadetools.net/forum/...151#post120966
https://www.homemadetools.net/forum/...958#post119947
