An iron-type golf club head comprising a topline, a sole in opposed relation to the topline, and a front portion extending from the topline toward the sole. The front portion includes a leading edge, a substantially planar hitting region including a face center, and a peripheral region. The peripheral region at least partially surrounds the hitting region such that the hitting region and the peripheral region define therebetween a visually-recognizable hitting region boundary line including a sole-proximate boundary line segment such that when the club head is oriented in a reference position relative to a virtual ground plane, and in a virtual vertical plane perpendicular to the hitting region and passing through the face center, the sole-proximate boundary line segment is vertically spaced above the leading edge by a distance D1 that is no less than 2.5 mm.

A head 2 includes a face surface 4, a back surface 6, and a sole surface 8. The back surface 6 includes a top side region Rt and a sole side region Rs. The sole side region Rs includes a sole side inclination surface Sb1 inclined to increase a face thickness toward a sole side, a plurality of back recessed parts Rb1 formed on the sole side inclination surface Sb1, and a wall WL1 formed between the back recessed parts Rb1 adjacent to each other. A low specific gravity member X1 having a specific gravity lower than the specific gravity of the face material is disposed on at least one of the back recessed parts Rb1. The head 2 has a loft angle of equal to or greater than 42°. The head 2 has a sweet spot height of equal to or greater than 19 mm.

Embodiments of a golf club set with progressive tapered face thickness coordinated with club loft are generally described herein. Other embodiments may be described and claimed.

A ball striking device, such as a golf club head, has a face with a striking surface configured for striking a ball and a channel extending across a portion of the sole. The channel may be recessed from adjacent surfaces of the sole and have a depth of recession from the adjacent surfaces of the sole. A pair of ribs are positioned within the channel. The ribs may diverge away from one another and may have a first rib located in a toe portion of the channel and a second rib located in the heel portion of the channel.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a method of manufacturing a golf club head may include forming a body portion having an interior cavity portion and a plurality of ports, forming a face portion, attaching the face portion to the body portion to close the interior cavity, injecting a polymer material into the interior cavity portion through a port in the body portion, and closing the ports with a plurality of mass portions. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head may include a body portion having a toe portion with a toe portion edge, a hosel portion, a top portion with a top portion edge, a sole portion with a sole portion edge, a front portion, a back portion with a back wall portion, and an interior cavity having a first recessed portion having a center portion of the interior cavity including a maximum width of the interior cavity, and a second recessed portion at least partially surrounding the first recessed portion and located proximate to a perimeter portion of the body portion. A first filler material is in the first recessed portion, and a second filler material is in the second recessed portion. The first filler material and at least a portion of the second filler material engage an inner surface of the back wall portion. At least one physical property of the first filler material is different from at least one physical property of the second filler material. Other examples and embodiments may be described and claimed.

Golf club heads include a golf club head body, a ball striking face, and a shaft engaging member configured to engage a golf club shaft with the golf club head body. The golf club head may be configured with a first piece and a second piece, which may be in the form of the shaft engaging member and a body member connected to the shaft engaging member. The shaft engaging member includes a base member and an arm extending from the base member, and the body member includes a face having a striking surface configured for striking a ball and a club head body positioned behind the face, the second piece having a receiving slot positioned behind the face, where the base member of the first piece is at least partially received within the receiving slot.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion comprising a material having a first density and an interior cavity having a filler material therein comprising a material having a second density. The golf club head also includes a first mass portion coupled to the body portion and a second mass portion coupled to the hosel portion. The first mass portion and the second mass portion comprise a material having a third density. A port on the body portion is configured to receive the first mass portion. At least a portion of the first mass portion is below a horizontal midplane of the body portion. The first density is greater than the second density. The third density is greater than the first density. A distance between a portion of the first mass portion and the hosel portion is substantially greater than a distance between the portion of the first mass portion and the toe portion edge. The first mass portion and the second mass portion have at least one different physical property. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head may include a body portion having a face portion including a front surface, a back surface, a plurality of front grooves on the front surface, a face perimeter, and a back groove portion on the back surface. The back groove portion may include a back groove portion length extending on the back surface of the face portion proximate to the face perimeter. The back groove portion length may be greater than or equal to 50% of the face perimeter. Other examples and embodiments may be described and claimed.

A length adjustable golf club includes a club head attached to a shaft at a lower end. A length adjusting kit includes a shaft insert that attaches to the shaft at an upper end. The shaft insert includes a coupling port that accepts one of an extension block or a grip adapter. To provide length adjustments of the overall club length, one or more extension blocks may attached between the shaft insert and the grip adapter. A grip assembly having a reinforcing sleeve connects to the grip adapter and extends over the shaft and any extension blocks. The grip assembly couples to the shaft through a grip adapter and grip coupling. The grip adapter and grip coupling are axially moveable prior to securement with a retaining fastener. The grip coupling may be rotationally constrained or rotationally adjustable relative to the grip adapter.