Toyang 12 inch Power Jaws pipe wrench

 

Here's a Power Jaws pipe wrench made by a Japanese company, Toyang. As usual, not much information on the company online. 

It's a clever design, rotating the head clockwise through the handle opens the jaws. When the jaws slip over the pipe diameter,  rotating the handle clockwise tightens the jaws on the pipe as the pipe is turned. It's fun but just how useful it is, I'm not sure.

Random Youtube showing the operation (not mine).