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Help you adjust For Callaway Big Bertha Alpha 815 Drivers Head weight. Material: 3g-5g made in Aluminium Alloy, technology and materials are good. 7g-15g made in Stainless Steel. Please choose the size you want to buy. Different size, the price is not the same. Please do not use strong when you tighten the screws, thanks! Help you adjust For Callaway Big Bertha Alpha 815 Drivers Head weight. Material: 3g-5g made in Aluminium Alloy, technology and materials are good. 7g-15g made in Stainless Steel. Please choose the size you want to buy. Different size, the price is not the same. Package Include: 1pc X 3g Please do not use strong when you tighten the screws, thanks!



