Abstract: A tool for assisting in producing a straight edge on a piece of rough cut raw material, such as lumber or masonite. The tool is held in place on top of the piece by gripping means which grip the piece along two opposite side edges. The tool's straight edge, unobstructed by clamps or other protrusions, is then used as a guide to bank against the saw fence of a table saw, radial arm saw, or circular saw, producing a straight edge on the piece. Using the tool, one can take the flat bow out of a piece and also remove the rough mill edge. The tool can also be used with a hand circular saw, jig saw, or router by running the saw directly along the tool's unobstructed straight edge.