Abstract: A workpiece positioning apparatus for a precision machine tool includes an abutment member having an end for abutment by a workpiece mounted on a body. A fastener passageway extends through the body from an end surface to a peripheral surface. A fastener is movably mounted in the fastener passageway for driven movement through the peripheral surface to wedge the body in a passage of the machine tool.

Abstract: A pair of V block centers, for being used with a conventional V block, in order to support and center any rectangular stock upon the V block, while being machined; the pair of V block centers each consisting of an elongated rectangular bar, which has one of its longitudinal corners cut out to form an inside square corner, in which a rectangular work piece is positioned, an opposite longitudinal corner of the bar being cut off at a forty-five degree angle, in order to rest against the angular face of the conventional V block, the V block centers thus supporting the work therebetween, while a conventional V block clamp then holds the work secure therein.