Abstract: A device for making a composite structural member of the type made up of a plurality of superimposed structural elements secured together by staples includes a guide block disposed above and a receiving block disposed beneath said superimposed structural elements. The guide block has a plurality of elongated grooves having spaced openings whereby staples pass through said openings and through said superimposed structural elements to engage grooves in said receiving member which turn the ends of the staples laterally to thereby secure the staple.