In order to get the maximum performance out of this product we reccomend it to be sold via face to face custom fitting so please call us or visit our store to arrange for your personal fittingthe big bertha alpha 815 driver establishes a new driver category its a pioneer that gives you the benefit of maximum distance from low spin and forgivenessmaximum distance from lower spinwe lowered the spin in the alpha 815 to help you maximize distance howrsquod we do it start with a forged