A swager for swaging articles, such as marker bands to a medical catheter, comprising an article input mechanism; a radial compression swaging head with a central swaging aperture, the swaging head being aligned and communicatively coupled with the input mechanism to receive an input article from the article input mechanism and to swage the article. The swaging head includes a plurality of swage elements; a rotatable slider plate; a plurality of track rollers; and a closer plate. An input mechanism is aligned and communicatively coupled with the swaging head to assist in delivering an article to the swaging head.