A putter is described. The putter includes a composite putter head having a high moment of inertia. The putter also includes a putter head face connected to the composite putter head. The putter further includes a hosel for mounting to a putter shaft. The putter also includes a plurality of sole weights mounted in a sole of the composite putter head.

Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Disclosed herein is an iron-type golf club head that comprises a body, made of a first material having a first density. The iron-type golf club head also comprises a weight located within the internal cavity. The iron-type golf club head further comprises a filler material that has a density no less than 0.21 g/cc. The filler material has a mass no less than 2.5 grams and no more than 8 grams. The internal cavity has an internal cavity volume ranging between 5 cc to 20 cc. A ratio of the internal cavity volume to external club head volume ranges between 0.14 and 0.385. The internal cavity has a minimum front-to-back depth above a midplane of the golf club head of no less than 1.4 mm and a maximum front-to-back depth of the internal cavity above the midplane of the golf club head is no more than 13 mm.

Some embodiments include club heads having reinforced club head faces. In one example, the club face comprises a reinforcement element such as a looped rib positioned on a rear surface of the club face to provide reinforcement. The club head further comprises an undercut that extends along the entire perimeter of the club face to provide increased club face bending. The combination of the reinforcement element and the undercut reinforces the club head while permitting the club face to bend. Other embodiments of related club heads and methods are also disclosed.

A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA).

A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA).

A hollow-type golf club head, when oriented in a reference position, includes: a striking wall; a sole portion; a top portion having an exterior surface and an interior surface; a hosel extending from the top portion and defining a hosel axis; and a plurality of external ribs located on the exterior surface of the top portion. The plurality of external ribs are each generally elongate in a front-to-rear direction, and at least one internal rib is located on the interior surface of the top portion and is generally elongate in the front-to-rear direction. The at least one internal rib is spaced from the plurality of external ribs by a distance D1 no less than 2 mm as considered in top view of the club head.

A hollow-type golf club head, when oriented in a reference position, includes: a striking wall; a sole portion; a top portion having an exterior surface and an interior surface; a hosel extending from the top portion and defining a hosel axis; and a plurality of external ribs located on the exterior surface of the top portion. The plurality of external ribs are each generally elongate in a front-to-rear direction, and at least one internal rib is located on the interior surface of the top portion and is generally elongate in the front-to-rear direction. The at least one internal rib is spaced from the plurality of external ribs by a distance D1 no less than 2 mm as considered in top view of the club head.

Aspects of the invention are directed to golf club having a crown, a sole, a face, and a primary alignment feature hard tooled into the golf club head. In some embodiments the golf club has a primary alignment feature comprising a line delineating a transition between at least a portion of the crown having an area of contrasting shade or color with a shade or color of the face. The primary alignment feature is hard tooled into the golf club head with the face of the golf club body.

A cast cup can include a forward portion of a golf club head, including a hosel, forward portions of a crown, sole, heel, and toe, and a face portion or an opening to receive a face insert. A rear ring can be formed separately from the cast cup and coupled to heel and toe portions of the cast cup to form a rigid club head body, such that the club head body defines a hollow interior region, a crown opening, a sole opening, and/or face opening. The cast cup and rear ring can be made of different materials, including various metals, composites, and polymers. Composite crown, sole, and/or face inserts can be coupled to the crown, sole, and/or face openings. Weights can be coupled to the cast cup and to the rear ring. The face can have a complex variable thickness geometry.