To change a head angle to multiple angles with a changing means at one place and change the grip angle to multiple angles with the same changing means at another place.

A hard rubber 3 is inserted into the base end cavity section 2 of a head 1, a ball 5 provided at the base end section of a shaft 4 is inserted, and a hard rubber 3 is inserted. A male screw 6 is screwed to fasten the ball 5 via the hard rubbers 3, 3. A similar structure is formed at the base end section of a grip and the base end section of the shaft 4 with the ball 5 and the hard rubber 3. A changing means is variably connected with a structural body formed into a substantially spherical surface and other structural bodies movable along the substantially spherical surface. The angle can be freely changed longitudinally, laterally, and diagonally with the changing means at one place.