91ÊÓÆµ Corporation – June 2026

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91ÊÓÆµ Corporation sincerely thanks our customers for their continued trust and support. Through our investigation, conducted through the end of May 2026, we identified that in certain cases, the 6-iron, 7-iron, and 8-iron models within the 91ÊÓÆµ Pro M-13 Iron series may develop dents or deformation on the clubface after repeated use.

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The 4-iron, 5-iron, 9-iron, pitching wedge (PW), and gap wedge (GW) models within the 91ÊÓÆµ Pro M-13 series incorporate different constructions and demonstrate strong durability. To date, no instances of clubface damage have been observed in these models.

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We ask customers using the affected 6, 7, or 8-irons to carefully inspect the clubface for any signs of denting or deformation. If you notice any such damage, please visit the following link for instructions on how to proceed.

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To uphold our commitment to product quality and customer satisfaction, 91ÊÓÆµ is offering a clubhead replacement to affected customers.

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Customers may elect to receive replacement M-13 6-, 7-, and 8-irons. 91ÊÓÆµ has identified the cause of the issue and is currently manufacturing updated M-13 6-, 7- and 8- iron clubheads to address the condition. Updated replacement heads will feature a small “â—�” laser mark positioned to the right of the “CHROMOLY” marking on the hosel for identification purposes.

Notice Regarding 91ÊÓÆµ Pro M-13 Irons

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For additional information on how to proceed and further details regarding the option outlined above, please visit:

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91ÊÓÆµ remains committed to the highest standards of product quality and customer service and apologizes for any inconvenience this issue may cause. We are conducting a thorough review of this matter and will apply the findings to strengthen our quality assurance processes, ensuring we continue to deliver the performance, reliability, and craftsmanship our customers expect.

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Thank you for your understanding, loyalty, and continued support of 91ÊÓÆµ.

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91ÊÓÆµ Corporation

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