Golf club head

A putterhead comprising a body having a front striking surface, a bottom surface, a center of gravity located at least 30 mm rearward from the striking surface and less than about 13 mm from a horizontal ground plane contacting the bottom surface, and a moment of inertia of at least 400 kg-mm2 wherein the body comprises:

• a face portion defining the front striking surface;
• a rear portion;
• a heel portion extending from the face portion to the rear portion;
• a toe portion extending from the face portion to the rear portion, the heel and toe portions being on opposite sides of the longitudinal axis of symmetry of the putter head;
• and
• a central portion located between the heel portion and the toe portion and extending from the face portion to the rear portion;
• wherein the heel portion and the central portion define a first main opening in the putter head and the toe portion and the central portion defines a second main opening in the putterhead;
• wherein the heel portion includes a first side opening extending the majority of the length of the putterhead and the toe portion includes a second side opening extending the majority length of the putterhead;
• wherein the face portion comprises a vertically disposed laterally extending first plate and the central portion comprises a vertically disposed, laterally extending second plate rearward from the first plate, the face portion comprising a crown portion interconnecting the first and second plates at the upper edges thereof, the second plate having a width that is less than that of the first plate.

A putter head comprising:

• a front portion having a front surface for striking a ball, the front portion comprising a vertically disposed, laterally extending front plate defining the front surface and a crown portion extending rearwardly from an upper edge of the front plate;
• a rear portion comprising at least one opening adapted to receive a removable weight;
• first and second side portions extending between respective ends of the front portion and the rear portion, the first and second side portions converging from the front portion to the rear portion, the first and second side portions having respective elongated openings extending substantially the entire lengths of the side portions;
• and
• a central portion located between the first and second side portions and extending from the front portion to the rear portion, the central portion comprising a vertically disposed, laterally extending rear plate spaced from the front plate, the rear plate being connected to and extending downwardly from the crown portion, the rear plate having a width that is less than that of the front plate, the central portion also comprising a vertically disposed, longitudinally extending alignment plate extending from the rear plate to an enlarged aft-mass portion of the central portion, the central portion defining a bottom surface of the putter head;
• wherein the first side portion and the central portion define a first main opening in the putter head and the second side portion and the central portion define a second main opening in the putter head;
• wherein the putter head has a center of gravity located at least 30 millimeters rearward from the front surface and less than about 13 millimeters from a horizontal ground plane contacting the bottom surface;
• wherein the putter head has a moment of inertia of at least 400 kilogram square millimeters.