The unique design ensures that the jaws close parallel at all times. Pressure is applied evenly on the gripped nut, bolt or pipe no matter what its shape is. And the jaw serrations add extra security. Two sizes are available: 7" long with a 1" max opening and 9" long with a 1-1/2" max opening.
These are exceptional and versatile tools that you will gladly trade for your conventional pliers. You will use them all the time. Recommended highly as a phenomenal value.