The Junior OPTM MAX-K Driver is Cobra’s most forgiving driver head designed specifically for Junior golfers. Featuring the same exact head design and advanced technolgies as the standard MAX-K driver, the Junior model is configured with a lightweight Cobra Junior shaft in different length and weight spec options for different age and height ranges. With the purchase of a Junior driver, you are eligible for a FREE shaft upgrade as your junior grows into their game. The Junior OPTM MAX-K Driver achieves our highest MOI ever. Engineered through advanced supercomputing, its optimized weight placement and refined shaping create Cobra’s most forgiving driver head. Expect straighter shots, reduced side spin, and exceptional forgiveness. ON TARGET. ON REPEAT. ON OPTM. OPTM drivers utilize strategic shaping and weight placement to minimize Products of Inertia (POI), the measure of a club’s resistance to twisting across multiple axes at once. Resulting in reduced side spin, tighter dispersion, increased accuracy, and more fairways hit.