Abstract: A set of golf club heads, each comprising a metal body and hosel and a resin composite striking face with oriented reinforcing fibers. In the resin composite, glass fibers are oriented horizontally and graphite fibers are oriented perpendicular to the glass fibers. Within each club head is formed a borehole parallel to the striking face and parallel to the ground at the instant the club head strikes a ball. The borehole is partially filled with tungsten powder. Resin plugs in the borehole retain and locate a measured quantity of tungsten powder to balance the golf club and create a "sweet line" for ideal striking of the ball. Thus, within the set of club heads the angle of the borehole relative to the bottom of the club head increases with increasing club number as does the transverse angle of the borehole to the centerline of the hosel.