Abstract: The jig includes a base plate slidably positionable upon the tool table and having an upper surface for supporting a work piece which is to be cut. Two parallel guide bars are attached to the underside of the base plate to slide within the guide slots of the tool table. The base plate includes a substantially vertical work advancing abutment extending upwardly from the work-supporting surface, and a through slot extending from the edge opposite to the work advancing abutment for accommodating the cutting tool.