A kit for use in realigning a door connected to a jamb includes a plurality of replacement hinges having different sized gaps formed between the leaves thereof when pivoted to extend in parallel, juxtaposed alignment, including gaps that are narrower and wider than a standard gap of the conventional hinges currently used to hang the door, prior to installation. A zero gap replacement hinge may have no gap between the leaves when in the closed position. The kit may include multiple reduced gap replacement hinges with varying sized gaps and multiple enlarged gap replacement hinges with varying sized gaps. To rehang a sagging door, the top conventional hinge may be replaced with a reduced gap replacement hinge and the bottom conventional hinge may be replaced with an enlarged gap replacement hinge. The reduced gaps and the enlarged gaps of the replacement hinges may be formed using a swaging technique.