Abstract: A metal head for an iron-type golf club is provided with a pair of elongated chambers disposed end-to-end within the lower longitudinal portion thereof. The pair of chambers are respectively disposed in the toe and heel half portions of the head. A pair of threaded apertures are provided on the sole of the head for communicating with the respective chambers. A threaded closure member is fitted within each aperture. Initially, each of the chambers is half filled with a heavy metal powder substantially greater in density than the density of the head metal. By adding, subtracting or interchanging varying amounts of the metal powder in the chambers, the center of mass of the head and, therefore, the center of the sweet spot on the striking face thereof, can be shifted about in any direction over a working zone.