Metal wood club

1. A golf club head comprising:

a body having a face, a sole, a crown, and a skirt joining said face, sole and crown, said body having a center of gravity;

said body having a coordinate system with an x-axis located horizontal to the club face, a y-axis located vertical to the club face, and a z-axis located through the club face,

wherein said body comprises a cavity;

wherein said cavity comprises an open end and a terminal end, said terminal end opposite said open end;

a weighted insert, said weighted insert comprising a heavy end and a lighter end, said lighter end opposite said heavy end;

wherein said weighted insert comprises a longitudinal insert axis along a center of said weighted insert and passing through said heavy end and said lighter end;

wherein said cavity comprises a longitudinal cavity axis along a center of said cavity and passing through said open end and said terminal end;

wherein said cavity is configured to receive said weighted insert through said open end in both a first configuration and a second configuration;

wherein said first configuration comprises said heavy end of said weighted insert adjacent said terminal end of said cavity;

wherein said second configuration comprises said lighter end of said weighted insert adjacent said terminal end of said cavity;

wherein said cavity comprises a head locking member;

an insert locking member;

wherein said insert locking member comprises an insert locking feature configured to engage a head locking feature of said head locking member as said insert locking member is rotated relative to said head locking member;

wherein said insert locking member is configured to translate along said longitudinal cavity axis as said insert locking member is rotated about said longitudinal cavity axis;

wherein said head locking member comprises a shelf and said insert locking member comprises a flange, said flange configured to abut said shelf when said insert locking member is in a locked position; and

a spring located between said insert locking member and said terminal end of said cavity.

2. The golf club head of claim 1 , wherein said insert locking member comprises a cap configured to removably attach to both the heavy end and the lighter end of the weighted insert.

3. The golf club head of claim 2 , wherein said insert locking member comprises a bore and wherein said spring is located within said bore of said insert locking member.

4. The golf club head of claim 1 , further comprising a low friction member located between said insert locking member and said weighted insert.

5. The golf club head of claim 1 , wherein said head locking member is located at an open end of said cavity.

6. The golf club head of claim 1 , wherein said insert locking feature comprises male threads and wherein said head locking feature comprises female threads.

7. The golf club head of claim 1 , wherein said spring comprises an elastomer.

8. The golf club head of claim 1 , wherein said flange of said insert locking member is configured to transmit at least a portion of a longitudinal load created by said insert locking feature engaging said head locking feature to said shelf of said head locking member.

9. A golf club head comprising:

a body having a face, a sole, a crown, and a skirt joining said face, sole and crown, said body having a center of gravity;

said body having a coordinate system with an x-axis located horizontal to the club face, a y-axis located vertical to the club face, and a z-axis located through the club face,

wherein said body comprises a cavity;

wherein said cavity comprises an open end and a terminal end, said terminal end opposite said open end;

a weighted insert, said weighted insert comprising a heavy end and a lighter end, said lighter end opposite said heavy end;

wherein said weighted insert comprises a longitudinal insert axis along a center of said weighted insert and passing through said heavy end and said lighter end;

wherein said cavity comprises a longitudinal cavity axis along a center of said cavity and passing through said open end and said terminal end;

wherein said cavity is configured to receive said weighted insert through said open end in both a first configuration and a second configuration;

wherein said first configuration comprises said heavy end of said weighted insert adjacent said terminal end of said cavity;

wherein said second configuration comprises said lighter end of said weighted insert adjacent said terminal end of said cavity;

wherein said cavity comprises a head locking member;

an insert locking member;

wherein said insert locking member comprises an insert locking feature configured to engage a head locking feature of said head locking member as said insert locking member is rotated relative to said head locking member;

wherein said insert locking member is configured to translate along said longitudinal cavity axis as said insert locking member is rotated about said longitudinal cavity axis;

wherein said head locking member comprises a shelf and said insert locking member comprises a flange, said flange configured to abut said shelf when said insert locking member is in a locked position; and

a spring located between said insert locking member and said terminal end of said cavity;

wherein said spring is located between said heavy end and said lighter end of said weighted insert.

10. The golf club head of claim 9 , wherein said insert locking member comprises a cap configured to removably attach to both the heavy end and the lighter end of the weighted insert.

11. The golf club head of claim 9 , wherein said spring comprises a portion of said weighted insert, said portion comprising a spiral cut, allowing said weighted insert to vary in length when compressed.

12. The golf club head of claim 9 , further comprising a low friction member located between said insert locking member and said weighted insert.

13. The golf club head of claim 9 , wherein said head locking member is located at an open end of said cavity.

14. The golf club head of claim 9 , wherein said insert locking feature comprises male threads and wherein said head locking feature comprises female threads.

15. The golf club head of claim 9 , wherein said flange of said insert locking member is configured to transmit at least a portion of a longitudinal load created by said insert locking feature engaging said head locking feature to said shelf of said head locking member.

16. A golf club head comprising:

a body having a face, a sole, a crown, and a skirt joining said face, sole and crown, said body having a center of gravity;

said body having a coordinate system with an x-axis located horizontal to the club face, a y-axis located vertical to the club face, and a z-axis located through the club face,

wherein said body comprises a cavity;

wherein said cavity comprises an open end and a terminal end, said terminal end opposite said open end;

a weighted insert, said weighted insert comprising a heavy end and a lighter end, said lighter end opposite said heavy end;

wherein said weighted insert comprises a longitudinal insert axis along a center of said weighted insert and passing through said heavy end and said lighter end;

wherein said cavity comprises a longitudinal cavity axis along a center of said cavity and passing through said open end and said terminal end;

wherein said cavity is configured to receive said weighted insert through said open end in both a first configuration and a second configuration;

wherein said first configuration comprises said heavy end of said weighted insert adjacent said terminal end of said cavity;

wherein said second configuration comprises said lighter end of said weighted insert adjacent said terminal end of said cavity;

wherein said cavity comprises a head locking member;

an insert locking member;

wherein said insert locking member comprises an insert locking feature configured to engage a head locking feature of said head locking member as said insert locking member is rotated relative to said head locking member;

wherein said insert locking member is configured to translate along said longitudinal cavity axis as said insert locking member is rotated about said longitudinal cavity axis;

wherein said head locking member comprises a shelf and said insert locking member comprises a flange, said flange configured to abut said shelf when said insert locking member is in a locked position;

a spring located between said insert locking member and said terminal end of said cavity; and

a circumferential insert located within said cavity.

17. The golf club head of claim 16 , wherein said cavity comprises a circumferential groove configured to receive said circumferential insert.

18. The golf club head of claim 16 , wherein said circumferential insert comprises a plastic partial ring configured to reduce in diameter when compressed.

19. The golf club head of claim 16 , further comprising a low friction member located between said insert locking member and said weighted insert.