The Cobra OPTM MAX-K Driver is engineered to deliver Cobra’s highest MOI and most forgiving driver head. Computer-optimized shaping and weight placement help preserve ball speed, reduce side spin, and produce straighter, more stable results on off-center strikes.The Cobra OPTM MAX-K Driver is engineered to deliver Cobra’s highest MOI and most forgiving driver head. Computer-optimized shaping and weight placement help preserve ball speed, reduce side spin, and produce straighter, more stable results on off-center strikes.