Question for you. I have a shower drain with the PVC pipe going up into the drain. If I had a wrench which is "circular" there is no way I can get the wrench onto the flange. I would need an open end wrench. That seems like it would be a common problem for a tool like this. What am I missing? Thanks.

If you program the laser cutter to make 3/8" and 1/2" square drive holes so the tools can be used with ratchets and extensions they'd be much more useful and at only the cost of a few lines of G-code. I'm welding a scrap socket to mine but most users won't be weldors.

Interesting but if thicker, cut open a 2" gap to place over a current pipe to tighten. Some make these as the look like a Flare nut tool used in automotive on pipe nuts. The original was "Weather-Head" and has morphed from their. No two houses built the same, no two shower drains access the same. Not only am I the home owner, but an automotive ASE Master tech since 1978. I have built, cut or welded a lot of tools I ended up using once. Thanks for the video and looks great if installing new, but repair? Not so much as drill out a brass ring, bust loose, pull out, clean and 3-4 later, done and exhausted. But a 2 1/2" gap between sub-floor and shower bottom, inside the ceiling thru a 14" square access hole, in a drop ceiling. Nope.

how about a link where to purchase

Didn't work at all...