Golf club

1. A golf club kit including a golf club comprising:

a head having a hosel part;

a shaft; and

a reverse-tapered engagement part disposed at a tip portion of the shaft,

wherein:

the golf club kit further comprises a first spacer and a second spacer;

the reverse-tapered engagement part includes a sleeve having a reverse-tapered shape and being fixed to the tip portion of the shaft, and one of the spacers which is fitted outside of the sleeve;

the hosel part includes a hosel hole, and a hosel slit which is provided on a side of the hosel hole and enables the shaft to pass through the hosel slit;

the hosel hole has a reverse-tapered hole having a shape corresponding to a shape of an outer surface of the reverse-tapered engagement part;

the reverse-tapered engagement part is fitted to the reverse-tapered hole;

the first spacer has a wall thickness different from a wall thickness of the second spacer; and

a length of the golf club is changed by replacing the spacer being used with the other spacer.

2. The golf club kit according to claim 1 , wherein

the first spacer has a length different from a length of the second spacer.

3. The golf club kit according to claim 1 , wherein

the reverse-tapered engagement part further includes at least one extension sleeve capable of being attached to a butt end of the sleeve; and

the extension sleeve is fitted inside of the spacer being used while being attached to the butt end of the sleeve.

4. The golf club kit according to claim 3 , wherein a recess is provided on a side surface of the extension sleeve.

5. The golf club kit according to claim 4 , wherein an axial-direction position of a lower end surface of the reverse-tapered engagement part is the same regardless of the length of the golf club.

6. The golf club kit according to claim 3 , including a first extension sleeve and a second extension sleeve as the extension sleeve; wherein

the head has an extension-sleeve port to which the first extension sleeve and the second extension sleeve can be alternatively attached.

7. The golf club kit according to claim 6 , wherein

the second extension sleeve is longer than the first extension sleeve, and

the second extension sleeve is heavier than the first extension sleeve.

8. The golf club kit according to claim 3 , wherein

the head further has a falling-off prevention mechanism, and

the falling-off prevention mechanism has an abutting surface which abuts on a lower end surface of the extension surface.

9. The golf club kit according to claim 1 , wherein

the head further has a falling-off prevention mechanism, and

the falling-off prevention mechanism has an abutting surface which abuts on a lower end surface of the reverse-tapered engagement part.

10. The golf club kit according to claim 1 , wherein

the reverse-tapered hole has a sectional area which is increased toward a lower side,

an area of a figure formed by a sectional line of an outer surface of the sleeve is increased toward the lower side,

an area of a figure formed by a sectional line of an inner surface of each of the spacers is increased toward the lower side, and

an area of a figure formed by a sectional line of an outer surface of each of the spacers is increased toward the lower side.

11. The golf club kit according to claim 1 , wherein

a sectional shape of the reveres-tapered hole is a non-circle,

a sectional shape of an outer surface of the sleeve is the non-circle,

a sectional shape of an inner surface of each of the spacers is the non-circle, and

a sectional shape of an outer surface of each of the spacers is the non-circle.