Pneumatic torque wrench.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net..._regulator.jpg
Previously:
https://www.homemadetools.net/forum/...229#post165489
https://www.homemadetools.net/forum/...462#post131847
https://www.homemadetools.net/forum/...410#post161985
https://www.homemadetools.net/forum/...029#post145111
https://www.homemadetools.net/forum/...651#post118209
https://www.homemadetools.net/forum/...685#post167135
