32-gram adjustable back weight (Neutral, Draw, Fade) in the G440 K helps achieve PING highest-MOI adjustable driver 4g heavier back weight in the G440 K compared to the G430 MAX 10K moves CG lower and deeper for more ball speed and extreme MOI Dual Carbonfly Wrap crown and sole, plus Free-Hosel technology save weight in the G440 K to help position CG lower and deeper with high MOI. Free Hosel saves weight from the heel section of the G440 K to retain ball speed in that region of the face Composite crown bridge and sole ribs damp vibrations are engineered into the G440 K to improve sound with a muted and powerful impact experience The G440 K features a cast Ti 811 body, faster T9S+ face; PING's largest profile front to back Max MOI/Draw Adjustment tool is NOT included and is sold separately