Abstract: A golf club head comprises a front portion, a rear portion, a toe portion and a heel portion that together form a two-piece body and for which a center of gravity is defined. The body comprises a central portion as a first piece and a frame as a second piece. The frame encloses a substantial portion of the central portion within an XY-plane. The central portion is connected with the frame with fasteners along at least the front portion. The moment inertia of the club head about a z-axis of the center of gravity is between about 7,000 g·cm2 and about 14,000 g·cm2.

Abstract: A golf club head is provided having a club body and a contact plate secured to the club body. The contact plate defines at least a portion of a striking surface having a plurality of striking surface grooves. A plurality of soft portions is provided that are coupled to a rear surface of the contact plate. The plurality of soft portions also corresponds to the plurality of striking surface grooves.

Abstract: A golf club head having a composite face insert attached to a metallic body is provided. The club head preferably has a volume of at least 200 cc and provides superior durability and club performance. The face insert includes prepreg plies having a fiber areal weight (FAW) of less than 100 g/m2. The face insert preferably has a thickness less than 4 mm and a mass at least 10 grams less than an insert of equivalent volume formed of the metallic material of the body of the club head. A metallic cap with a peripheral rim is also provided to protect the ends of the composite material of the face insert. Related methods of manufacturing and alternative materials are disclosed. The resin content of the prepreg plies can be controlled through management of the timing and environment in which the resultant prepreg plies are cured and soaked.

Abstract: A golf club head comprises a front portion, a rear portion, a toe portion and a heel portion that together form a two-piece body and for which a center of gravity is defined. The body comprises a central portion as a first piece and a frame as a second piece. The frame encloses a substantial portion of the central portion within an XY-plane. The central portion is connected with the frame with fasteners along at least the front portion. The moment inertia of the club head about a z-axis of the center of gravity is between about 7,000 kg·mm2 and about 14,000 kg·mm2.

Abstract: An adjustable length golf club including an engaging mechanism, a rotational shaft, a locking mechanism, and a lower shaft. The rotational shaft is connected with the engaging mechanism and is configured to rotate upon movement by the engaging mechanism. The locking mechanism is connected with the rotational shaft and includes a locking insert and a locking collar located on the locking insert. The locking insert being is configured to retain the locking collar during axial movement. The lower shaft has an inner surface that is in frictional contact with the locking collar. The locking insert is threadingly engaged with the locking collar and a first rotational movement in a first rotational direction by the rotational shaft causes the locking insert to move the locking collar creating a frictional locking engagement between the locking collar and the inner surface of the lower shaft.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: A golf club head is provided having a club body and a contact plate secured to the club body. The contact plate defines at least a portion of a striking surface having a plurality of striking surface grooves. A plurality of soft portions is provided that are coupled to a rear surface of the contact plate. The plurality of soft portions also corresponds to the plurality of striking surface grooves.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An adjustable length golf club including an engaging mechanism, a rotational shaft, a locking mechanism, and a lower shaft. The rotational shaft is connected with the engaging mechanism and is configured to rotate upon movement by the engaging mechanism. The locking mechanism is connected with the rotational shaft and includes a locking insert and a locking collar located on the locking insert. The locking insert being is configured to retain the locking collar during axial movement. The lower shaft has an inner surface that is in frictional contact with the locking collar. The locking insert is threadingly engaged with the locking collar and a first rotational movement in a first rotational direction by the rotational shaft causes the locking insert to move the locking collar creating a frictional locking engagement between the locking collar and the inner surface of the lower shaft.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface and a rear surface. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface and a rear surface. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: A golf club head having a composite face insert attached to a metallic body is provided. The club head preferably has a volume of at least 200 cc and provides superior durability and club performance. The face insert includes prepreg plies having a fiber areal weight (FAW) of less than 100 g/m2. The face insert preferably has a thickness less than 4 mm and a mass at least 10 grams less than an insert of equivalent volume formed of the metallic material of the body of the club head. A metallic cap with a peripheral rim is also provided to protect the ends of the composite material of the face insert. Related methods of manufacturing and alternative materials are disclosed. The resin content of the prepreg plies can be controlled through management of the timing and environment in which the resultant prepreg plies are cured and soaked.