Adjustable putter shaft stiffener

A golf club comprising:

• a first shaft having a first end and a second end, wherein the first end of the first shaft is coupled to a club head;
• a second shaft configured to slidably engage a portion of the first shaft;
• wherein the second shaft comprises a first end, and a butt end;
• a third shaft configured to slide over the first shaft and the second shaft;
• wherein the third shaft comprises a first end, a butt end, an upper portion, and a lower portion;
• wherein the upper portion and the lower portion are discrete components;
• wherein the third shaft upper portion is formed integrally with the second shaft;
• wherein the third shaft upper portion fully encases the second shaft;
• a grip coupled to the third shaft upper portion;
• wherein the lower portion is slid over the first shaft and connected to the first shaft directly below the grip first end;
• wherein the grip comprises a first end and a butt end;
• and
• an adjustable length shaft assembly at least partially positioned within the second shaft, near the first shaft second end, and configured to permit a portion of the first shaft to slide in relation to the second shaft and the third shaft, the adjustable length shaft assembly comprising:
• an insert permanently attached to the second end of the first shaft preventing any movement between the insert and the first shaft during operation of the shaft length assembly, the insert comprising a threaded aperture;
• and
• an adjustment member comprising a threaded screw configured to threadably engage with the threaded aperture of the insert, the adjustment member configured to rotate the insert configured to travel long the adjustment member as the adjustment member rotates to allow the first shaft to slide in relation to the second shaft to adjust the length of the golf club;
• wherein the insert and the first shaft move together either away or toward the butt end of the second shaft;
• wherein the first shaft extends relative to the first end of the second shaft;
• wherein the adjustment length of the golf club shaft requires a tool to be engaged with the adjustable length shaft assembly;
• and
• wherein the grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.