Adjustable golf club

A golf club head comprising:

• a striking face;
• a top portion;
• a sole portion opposite the top portion;
• and
• a hosel extending from the top portion, the hosel including a sidewall, a tip end, an internal bore configured to removably secure a shaft assembly to the golf club head, a hosel axis, and an aperture extending through, and circumscribed by, the sidewall,
• wherein the aperture has a width greater than or equal to 2 mm and less than 4 mm,
• wherein the aperture has a top portion and a bottom portion such that at least one of the top portion and the bottom portion, in its entirety, follows a semi-circular path, and
• wherein the sidewall circumscribing the aperture includes an inner surface having a first thickness T1 in a radial direction from the hosel axis and a chamfered edge having a second thickness T2 in the radial direction, T1/T2 being between approximately 3 and 7.33, and the chamfered edge extending outward of the inner surface to form an interior angle therebetween of between about 110° and 160°.

A golf club comprising:

• a striking face;
• a top portion;
• a sole portion opposite the top portion;
• a shaft assembly including a shaft having a butt end and a tip end, and a shaft sleeve located at the tip end, the shaft sleeve including indicia;
• and
• a hosel extending from the top portion, the hosel comprising a hosel axis, a sidewall, an internal bore for receiving the shaft assembly, and an aperture extending through the sidewall such that the indicia of the shaft sleeve corresponds with the aperture,
• wherein the aperture extends in a direction along the hosel axis by a first distance and extends circumferentially to the hosel axis by a second distance that is less than the first distance such that the second distance is greater than or equal to 2 mm and less than 4 mm,
• wherein the aperture has a top portion and a bottom portion such that at least one of the top portion and the bottom portion, in its entirety, follows a semi-circular path, and
• wherein the sidewall through which the aperture extends includes an inner surface having a first thickness T1 in a radial direction from the hosel axis and a chamfered edge having a second thickness T2 in the radial direction, T1/T2 being between approximately 3 and 7.33, and the chamfered edge extending outward of the inner surface to form an interior angle therebetween of between about 110° and 160°.

A golf club comprising:

• a striking face;
• a top portion;
• a sole portion opposite the top portion;
• a shaft assembly including a shaft having a butt end and a tip end, and a shaft sleeve located at the tip end, the shaft sleeve including indicia;
• a hosel extending from the top portion, the hosel comprising a hosel axis, a top section, a sidewall, an internal bore for receiving the shaft assembly, and an aperture having a width greater than or equal to 2 mm and less than 4 mm and extending through the sidewall such that the indicia of the shaft sleeve aligns with the aperture, the aperture having a top portion and a bottom portion such that at least one of the top portion and the bottom portion, in its entirety, follows a semi-circular path,
• wherein a portion of the sidewall at the top section of the hosel includes an anti-deformation structure configured to reduce deformation of the top section of the hosel, the anti-deformation structure at least partially defining the aperture, and the indicia of the shaft sleeve indicates a position of the golf club when the shaft assembly is associated with the hosel in an operating position by display of the indicia through the aperture, and
• wherein the sidewall circumscribing the aperture extends includes an inner surface having a first thickness T1 in a radial direction from the hosel axis and a chamfered edge having a second thickness T2 in the radial direction, T1/T2 being between approximately 3 and 7.33, and the chamfered edge extending outward of the inner surface to form an interior angle therebetween of between about 110° and 160°.

A golf club comprising

• a striking face;
• a top portion;
• a sole portion opposite the top portion;
• a shaft assembly including a shaft having a butt end and a tip end, and a shaft sleeve located at the tip end, the shaft sleeve including indicia;
• and
• a hosel extending from the top portion, the hosel including a sidewall, an internal bore for receiving the shaft assembly, and an aperture extending through, and circumscribed by, the sidewall such that the indicia of the shaft sleeve corresponds with the aperture,
• wherein the aperture has an average thickness no greater than 2.5 mm and a width greater than or equal to 2 mm and less than 4 mm,
• wherein the aperture has a top portion and a bottom portion such that at least one of the top portion and the bottom portion, in its entirety, follows a semi-circular path, and
• wherein the sidewall circumscribing the aperture includes an inner surface having a first thickness T1 in a radial direction from a hosel axis and a chamfered edge having a second thickness T2 in the radial direction, T1/T2 being between approximately 3 and 7.33, and the chamfered edge extending outward of the inner surface to form an interior angle therebetween of between about 110° and 160°.