Abstract: A guide apparatus for workpieces being run thru machines such as wood-shapers or the like having guide fences, wherein the apparatus has elongated support rail structure having attachment clamps for quickly and easily removably affixing the apparatus to a wood cutting machine, wherein workpiece restraining structure is mounted on said rail structure for quick and easy vertical and lateral position adjustment with respect to a workpiece and the fence to provide a precision path for the workpiece thru the machine.