Putter heads and putters having adjustable, multi-sided ball striking face insert

1. A golf club head, comprising:

a golf club head body formed of two separable portions, a toe portion and a heel portion, and including a cavity formed therein;

an adjustable ball striking insert contained within the cavity and having at least four sides, at least two of the at least four sides having different groove patterns, the adjustable ball striking insert being adjustable to permit each of the at least four sides to form a ball striking face of the golf club head;

wherein the cavity is enclosed on three sides; and

wherein one of the at least four sides of the adjustable ball striking insert forms at least a portion of the ball striking face of the golf club head and the at least three remaining sides of the adjustable ball striking insert are enclosed within the golf club head.

2. The golf club head of claim 1 , wherein each of the four sides of the adjustable ball striking insert have different groove patterns.

3. The golf club head of claim 1 , wherein the adjustable ball striking insert is removably mounted in the cavity.

4. The golf club head of claim 1 , wherein the golf club head body is separable along a centerline of the golf club head.

5. The putter head of claim 1 , wherein the adjustable ball striking face insert has at least three sides.

6. The putter head of claim 1 , wherein the adjustable ball striking face insert has a substantially square cross section.

7. The golf club of claim 1 , wherein one or more of the sides have groove patterns comprising grooves arranged generally horizontally across the side.

8. The golf club head of claim 1 , wherein one or more of the sides have groove patterns comprising grooves extending in a non-horizontal linear or in a curved pattern across the side.

9. The golf club head of claim 1 , wherein one or more of the sides comprises groove patterns comprising grooves having portions extending generally horizontally across the side and portions extending at an angle downward on the side.

10. The golf club head of claim 1 , wherein one or more of the sides comprise grooves filled with a polymer material.

11. The golf club head of claim 1 , wherein a gasket is positioned between each portion of the golf club head body.

12. The golf club head of claim 1 , wherein a single fastening device located in an end portion of the club head body secures the insert and the two separable portions.

13. The golf club head of claim 1 , wherein one of the two separable portions of the club head body includes at least one locating pin and the other separable portion includes a corresponding locating pin hole.

14. A golf club, comprising:

a shaft;

a golf club head connected to a first end of the shaft, the golf club head including:

a golf club head body formed of two separable portions, a toe portion and a heel portion;

a cavity formed in at least a portion of a front face of the golf club head and extending rearward, toward a center of the golf club head;

an adjustable ball striking face insert contained within the cavity, the adjustable ball striking face insert having a plurality of sides, at least two of the sides having different groove patterns and each of the sides being configured to form at least a portion of a ball striking surface of the golf club head in an in-use position, the adjustable ball striking face portion being further adjustable to alter a loft angle of the ball striking surface; and

wherein a first side of the plurality of sides of the adjustable ball striking face insert forms at least a portion of the ball striking surface and remaining sides of the plurality of sides are contained within the cavity of the golf club head.

15. The golf club of claim 14 , wherein the adjustable ball striking face insert is rotatable to adjust the loft angle in increments between 0° and 6°.

16. The golf club of claim 14 , wherein the adjustable ball striking face insert has at least four sides.

17. The golf club of claim 14 , wherein the adjustable ball striking face insert is removably connected to the golf club head.

18. A golf club head, comprising:

a club head body formed of two separable portions, a toe portion and a heel portion, forming a top surface, a back surface, and a front surface;

a cavity formed in the club head body, the cavity extending from the front surface of the club head body, inward toward a center of the club head body;

an adjustable ball striking insert contained within the cavity and having at least four sides, at least two of the at least four sides having different groove patterns, a first side of the adjustable ball striking insert forming at least a portion of the ball striking surface of the golf club head and the top surface of the club head body extending over remaining sides of the adjustable ball striking insert obstructing a view of the remaining sides of the adjustable ball striking insert.

19. The golf club head of claim 18 , wherein the top surface of the golf club body obstructs the view of the remaining sides of the adjustable ball striking insert when the golf club head is in an address position.

20. The golf club head of claim 18 , wherein the cavity includes an aperture formed in the front surface of the club head body and through which the first side of the adjustable ball striking insert forming at least a portion of the ball striking face is visible from a front view of the golf club head.

21. The golf club head of claim 18 , wherein each of the at least four sides of the adjustable golf club head are configured to form at least a portion of the ball striking surface in an in-use position.

22. The golf club head of claim 18 , wherein each of the at least four sides of the adjustable ball striking face insert has groove patterns different from each of the other sides of the adjustable ball striking face insert.