I purchase this item in lieu of a pipe wrench. And found it to be so much more. I first used it to wind spring on my garage door. It was easier to use than a pipe wrench and there was no slippage on the Jaws. I then used it to break a one-inch nut that was so stubborn that I had to put a 4-foot cheater bar on the end of the wrench. With a little umph, the nut broke loose and once again there was no slippage of the Jaws. This is a handy tool that easily fits inside my portable tool box. I would recommend it for everyone who is mechanically inclined.
The lock button on this breaker wrench did not work, so the wrench could not be locked onto a pipe. Without it being able to lock on an item, it is useless. It does not appear that it was designed very well. The lock button component looks flimsy.
This pipe wrench, for pipes, is fine. But for nuts and bolts, what it's advertised for, it has a few stupid design flaws that make it unusable for those uses. First off, the button to change the claw size is on the wrong side of the tool and sticks way too far out. When you try to put it on a nut that is on a flat surface, that button points out towards the surface, making it impossible to grip correctly, let alone turn the tool properly. Second, the jaw on the handle has only a very small portion that is full width, which heavily restricts the sizes of nuts this will grab onto, as there are sizes of nuts smaller than the minimum size of the large setting, and the maximum size of the small setting. Trying to grab onto a nut of such size won't work because the bottom jaw will go to half width and not allow you to grab the nut because the top jaw is against the surface, but the bottom jaw isn't. Don't waste your money, buy a normal pipe wrench and/or extractor sockets.