Is nearby a circle shaped wrench on an Allen Wrench?--Tools? Okay, I'm trying to adjust a knife. The pivot screw's...

Okay, I'm trying to adjust a knife. The pivot screw's manager is just a complete circle. The dealer said I needed an allen wrench. Is there such item as an allen wrench that's like a circular leader?
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It is also call a hex-key. There are pictures in the source that you may certify. You can get them within almost any tool department or hardware. They come in sets.
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Do you know what kindly of floor this...
The best I can speak about of what you are saying is it sounds similar to a rivet, not a screw. If I could see it.
Or maybe you are describing a torx screw. (star shape ) or conceivably a square head. That is almost the only drive type tools.
Maybe you are conversation about a orb end Allen. That is for working the Allen wrench at angles.
But I ruminate form what you say you are chitchat about a rivet not an adjustment screw.
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Answers:    that doesn't sound close to a screw that sounds like a rivot if it is their is no screw it out all yoiu can do is drill it out and replace it