In general, aspects of this invention relate to blade-type iron golf clubs or golf club heads. The blade-type golf club head may comprise a body forged of a metal material. The body may include a hosel, a top surface, a sole, a heel, a toe, a ball striking surface, and a rear surface opposite the ball striking surface. The rear surface may have recess in which a dual-density insert is affixed. The dual-density insert may have a first portion or first insert with a density greater than a second portion or second insert with a lesser density located closer to the toe than the first portion or first insert located closer to the heel. The mass distribution of the dual-density insert moves the center of gravity of the club head closer or substantially coincident to the face center location.