A tool (FIG. 1) that assists in the placement and fastening together of pieces of material. The invention is comprised of valleys into which said pieces are placed. Said valleys have openings (portals) so that the exposed face of one piece can be aligned flush with the exposed face of another piece. The portals also allow an adequate means of fastening such as nails, screws, adhesive, etc. to be used to fasten them together at a predetermined angle. The invention may have multiple protruding valleys extending from a main valley, so that a base piece of material may have several pieces of material fastened to it—such as in framing the studs of a wall unit—without measuring distances or angles between pieces, thus saving considerable time, labor, and money.