Pulling a tee from a pipe. 1:59 video:
https://www.youtube.com/watch?v=rYj7EDZyB8c
More:
https://t-drill.com/sectors/plumbing/
More patents assigned to T-Drill Oy
Previously:
https://www.homemadetools.net/forum/...339#post146323
https://www.homemadetools.net/forum/...853#post144335
https://www.homemadetools.net/forum/...569#post143150
https://www.homemadetools.net/forum/...039#post140928
https://www.homemadetools.net/forum/...505#post135848
https://www.homemadetools.net/forum/...427#post131603
https://www.homemadetools.net/forum/...824#post100116
