Golf club heads with golf coupling mechanisms

A golf club coupling mechanism configured for joining an iron-type club head and a golf club shaft, the golf club coupling mechanism comprising:

• a shaft sleeve having a sleeve bore configured to receive an end of the golf club shaft;
• the shaft sleeve comprising:
• a top section;
• a bottom section;
• and
• a sleeve coupler set having a plurality of sleeve couplers protruding from an outer surface of the top section;
• the sleeve coupler set comprising:
• a first coupler having an arcuate surface curved throughout the first coupler;
• a second coupler having an arcuate surface curved throughout the second coupler;
• a third coupler having an arcuate surface curved throughout the third coupler;
• and
• a fourth coupler having an arcuate surface curved throughout the fourth coupler;
• a shaft cap configured to be inserted into the sleeve bore;
• a removable spacer configured to couple with the top section of the shaft sleeve;
• and
• a removable extender configured to couple with the bottom section of the shaft sleeve;
• wherein the removable extender is non-threadably secured to the shaft sleeve.