Oxygen wrench

*Update - added additional file with keyring hole. 

Oxygen bottles with a CGA870 post valves need a wrench to open them. This hand wheel will allow you to turn the stem. The size is comfortable and will help prevent over torqueing the valve seat.

There is also a file without writing on it for non O2 bottles.

The profile is printed with 5 walls and 15% crosshatch infill for strength and durability. No supports needed.