The release lever is easier to use than Vise-Grips but there may be other improvements. I have two such devices. pliers, and both had to be adjusted. One had the lower jaw protruding further than the upper jaw and had to be polished. On the other hand, the jaws also needed some grinding to be flush, and the jaws are misaligned side-to-side, but I didn't fix that. With Vise-Grips, the grinding is already done. On the second, the lever kept popping out of the groove in the middle, so I had to force the barrel into a vise to hold it in place. And the adjustment screw was bent, so I straightened it. Now it works fine. With the mods completed these are decent tools but aside from the release lever I prefer vise grips for the looks, fit and finish and the beefier adjustment screw (newer vise grips with quick release lever). work badly). And protos are expensive. I paid $18.45 and $26.24 for mine, but wouldn't buy another at the current price of $44.39. The Grip-On GR11105 looks the same as the Proto and costs $19.90.
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