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- Compatible with Callaway Quantum, Quantum Triple Diamond, and Quantum Max: 10 g rear weight fits the factory back port to adjust head mass and balance. - Swing Weight Tuning: Shifts center of gravity to influence launch and spin for subtle shot-shape and feel adjustments when changing shafts or grips. - Durable Alloy Construction: Precision metal build in red finish adds mass without affecting electronics and maintains a clean look once installed. - Easy Installation: Screws into the OEM interface for quick swaps between practice and play; use a standard golf torque tool or wrench (not included). - Custom Fit Aid: Apply a consistent 10 g step to fine-tune tempo and balance during range testing, course play, or home workshop setups.