Shaft Connect offers aftermarket replacement head weights compatible with select Mizuno ST-series drivers and M-Craft putters. Supported driver models include the Mizuno ST-G 220, ST-X 220, ST-Z 220, ST-X 230, and ST-Z 230.

Compatibility varies by model and weight design. Always check the individual product page to confirm the correct replacement weight for your Mizuno club.

Not all Mizuno driver weights are interchangeable. Different ST-series models and generations may use different weight dimensions, threading, or mounting designs, even when the weights appear similar.

Select a replacement weight specifically listed as compatible with your Mizuno driver rather than assuming weights from another model will fit.

Installing a heavier head weight generally increases swing weight and makes the clubhead feel heavier during the swing. A lighter weight reduces swing weight and can create a lighter overall head feel.

As a general club-building guideline, approximately 2 grams of head-weight change equals one swing-weight point. Adjusting head weight can be useful when changing shaft, grip, or playing length or when fine-tuning a club's balance.

Screw inclusion depends on the specific Mizuno weight design. Some replacement weights include the required installation screw, while others use an integrated mounting design or existing hardware.

Check the individual product description for details about what is included and the correct installation requirements.