Crafted with a slightly larger, yet still player-preferred, footprint than the LS, the X Driver offers an exceptional blend of speed, accuracy, stability, and forgiveness. Two weights in the driver's sole can be interchanged to fine-tune ball flight and trajectory control. MOI, or "moment of inertia", is the term the golf industry uses to measure a club's stability and forgiveness. When a mishit occurs, the club head rotates around the ball, causing the face to twist open and push a shot offline. The higher the MOI, the more stable the club is, and the more resistant it is to twisting at impact. Cobra's OPTM family of metalwoods and hybrids is the first to optimize the club head for POI, or "product of inertia." While MOI measures stability in both horizontal and vertical directions, POI measures stability diagonally. By optimizing both MOI and POI using advanced supercomputing to strategically position weight in the head, OPTM delivers dramatically increased stability and forgiveness. Cobra's testing backs that claim, with OPTM producing a 23% tighter dispersion, meaning significantly straighter and longer mishits. COBRA OPTM X Driver Features: Traditional shape, mid launch, low spin Designed for players seeking a blend of speed, stability, and forgiveness A.I. optimized for MOI and POI for maximum stability and forgiveness, resulting in reduced side spin, a tighter dispersion, and increased accuracy Forged face insert with H.O.T. Face technology delivers improved face flex for faster speeds and more distance across the face 2 Interchangeable sole weights (11g, 3g) allow you to fine-tune flight bias and trajectory control (neutral, fade) FutureFit33 hosel system offers 33 unique loft and lie settings for more fine-tuned customization options (loft and lie can be adjusted +/- 2� independently; SMARTPAD keeps the face angle square in every setting) Stock Shafts: Mitsubishi Kai'li Dark Waves Red, Mitsubishi Kai'li Dark Waves Blue, Mitsubishi Kai'li Dark Waves White,