Abstract: A vise square device for use between the jaws of a conventional vise to engage an irregular or inclined workpiece under clamping force to firmly seat and secure the workpiece, comprises first and second engaging plates having confronting recesses for receiving a spherical element, and at least one resilient member secured between the plates to provide a unitary device, the resilient member being deformable to accommodate relative movement between the plates and the spherical element to allow multi-directional plate adjustment to accommodate workpieces of irregular or inclined configuration. Serrations are preferably provided on the article-engaging plate face for improved securement of a workpiece.