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<p>[QUOTE=&quot;springfld.arsenal, post: 321762, member: 54&quot;]Machinist who praised these things has lots of experience.&nbsp; I think their holding ability has a lot to do with pressure in terms of psi.&nbsp; The cylindrical form of the end of the grip concentrates any force that is applied to the whole grip, and if the grip is positioned so it slants downward toward say a flat workpiece, only a small part of a circle presses on the work, increasing the pressure maybe to the point of elastically deforming the workpiece so it is nearly impossible for it to move horizontally-just what the machinist wants.&nbsp; Maximize force, minimize area = lots of psi.[/QUOTE]</p><p><br /></p>

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