Abstract: A putter is precision machined to form a concave horizontal face from the heel to toe of the hitting face. The curvature of the concave horizontal face may range from an arc of a five circle to an arc of a one-feet radius circle with the center point at the center of the hole. Thus the putter has a curvature of the horizontal or striking face ranging from the reciprocal of five feet to the reciprocal of one foot. Also provided in accordance with the present invention is a marking on the club head of the putter, the marking serving to assist with both aiming and centering. The marking is an arc of a concentric circle of the golf ball in front of the putter face and has a radius of curvature which is a function of the radius from the center point of a golf ball abutting the striking face. The marking may be used on putters having regular, non-concave striking faces.

Abstract: A golf putter has the hitting face with horizontally concave surfaces. The curvatures of the concave horizontal faces range arcs of five to one-foot radius circles.

Abstract: Improved golf club heads including irons, woods and putters have built-in provisions to change the weight of the golf club head including a way to increase, decrease or adjust the position and the amount of weights in a selected golf club head so as to enable the player to adjust the club's center of gravity, total club weight, and balance of the club and to tailor the club to compensate for an individual's style of swing, physical characteristics and skill level as a way of improving the golfer's accuracy and the distance of his shots.

Abstract: A putter is precision machined to form a concave horizontal face from the heel to toe of the hitting face. The curvature of the concave horizontal face may range from an arc of a five circle to an arc of a one-feet radius circle with the center point at the center of the hole. Thus the putter has a curvature of the horizontal or striking face ranging from the reciprocal of five feet to the reciprocal of one foot. Also provided in accordance with the present invention is a marking on the club head of the putter, the marking serving to assist with both aiming and centering. The marking is an arc of a concentric circle of the golf ball in front of the putter face and has a radius of curvature which is a function of the radius from the center point of a golf ball abutting the striking face. The marking may be used on putters having regular, non-concave striking faces.