Patent ID: 8628430

Claim:
A method for adjusting a property of a golf club comprising: a golf club head including; a head main body, formed with a hosel insertion hole; a hosel, formed with a shaft case insertion hole and removably mounted in the hosel insertion hole; and a shaft case, formed with a shaft insertion hole and removably mounted in the shaft case insertion hole; and a shaft, wherein a leading end of the shaft is inserted into and fixed to the shaft insertion hole, the method comprising: separating the hosel from the hosel insertion hole and shaft case; replacing the hosel with another hosel different therefrom in a position or an angle of the shaft case insertion hole; fixing the shaft case to the shaft case insertion hole; and fixing the hosel to the hosel insertion hole, when the hosel is fixed to the head main body, a first male screw, formed in an outer peripheral surface of a first screw member, is theadably engaged with a first female screw, formed in an inner peripheral surface of an entrance portion of the hosel insertion hole; and the first screw member is fitted with an outer surface of the hosel so that the first screw member is rotatably attached and is prevented from moving in an axial direction of the first screw member.