Weight options Includes a complete set of seven weights (3g, 5g, 7g, 9g, 11g, 13g, and 15g) for adjustments to your driver performance. Engineering Manufactured with advanced CNC processing to ensure a precise fit and improved oncourse accuracy. Compatibility Designed to seamlessly fit GTGT4 models for upgrades. Construction Made from robust ABS material to withstand regular use on the course. Benefits Allows for finetuning of swing weight and feel with seven selectable weights. Ensures consistent fit and performance due to CNC precision. Simple upgrade path for GTGT4 users. Durable construction for longterm use on the course. Use scenarios On course adjustment for wind and turf conditions to stabilize trajectory and control. Quick weight swaps to accommodate different players or coaching needs. Progressive training by temporarily using heavier weights to build feel and control for competition preparation.