A balanced toe/heel carbon composite construction with deep central back weight – for a spin efficient, straight-line ball flight. Built upon the 2nd generation of Mizuno's Forged SAT2041 Beta Ti face – for potent ball speeds and consistent performance over time.
"The ST-Z's predecessor the ST200 had a reputation for being a straight-line bomber favoured by our longer hitting tour players – and the ST-Z profile is no different. But with a year's extra experience of engineering Forged Beta SAT2041 Ti – we were able to release a little extra ball speed and a much more satisfying experience off the clubface."
Highly resilient Forged SAT2041 Beta Ti Face
As a high strength Beta Ti, SAT2041 maintains its characteristics and resists micro fractures for longer than the commonly used 6-4 Ti. 
New Multi-thickness CORTECH Face
Refined to maximize the return from Mizuno's Beta Ti face. Ball speeds most noticeably improved low on the clubface.
'Dense' or solid feedback: The majority of Mizuno's tour players expressed a preference for more dense feedback through impact. Mizuno's engineers spent a year finessing the sound to a more muted, powerful tone.
Quick Switch Adjustability
4 degrees of loft adjustability to fine-tune look and trajectory. Optimized Wave Sole Plate: Delivers an additional contribution to ball speed - low from the clubface.
Z Axis design for straight-line flight
Balanced use of carbon composite on the sole and deep central sole weight are biased towards a straight-line flight and low spin efficiency. Wide, low footprint: With neutral visual lie angle.
Specifications
    
        
            | Model | 
            Loft Range° | 
            Lie Range | 
            CC | 
            Length (inch) | 
            Hand  | 
        
    
    
        
            | ST-Z 9.5 | 
            7.5-11.5 | 
            56.5-59.5 | 
            460 | 
            45 | 
            RH/LH  | 
        
        
            | ST-Z 10.5 | 
            8.5-12.5 | 
            56.5-59.5 | 
            460 | 
            45 | 
            RH  |