This is the "metric version" see that 200 mm on the handle.
I have used it a few time on the buses at work and it is great, good tool for the road call box. It grips really well and with the adjustor end going to 1-1/4, I can even use it to tighen down PP1 valve nuts.
I have a 10 inch adjustable wrend and it only opens to 1".
