Boasting a staggering MOI of 13K, the oversized Max-K is Cobra's most forgiving driver and the most stable driver in golf. 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 Women's OPTM Max-K Driver Features: Oversized shape/profile, high launch, mid-low spin Designed for players seeking maximum 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 Fixed back weight (11g) positions CG low and deep to maximize MOI and stability 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 Vanquish 4 Ladies Stock Grip: SuperStroke Crossline Black/Silver (Undersize, 60R) Headcover Included Authorized COBRA Golf Retailer Specifications Loft Loft Range Lie Lie Range Length Volume Availability 12� 10� - 14� 59� 57� - 61� 44" 460cc RH/LH MCA Vanquish 4