Ping G440 K Max Driver RHPing G440 K Max Driver RH Highest MOI For Faster Ball Speeds Ping's G440 K Driver is built with the largest front to back head profile in the G440 driver family and introduces a new 32g adjustable back weight, making the G440 K Ping's straightest and highest MOI adjustable driver. The G440 driver family has made multiple engineering advancements to deliver more ball speed whilst continuing to deliver the game changing forgiveness expected from a Ping