Adams Lady a12 OS Hybrid The patent-pending Velocity Slot Technology in the new Idea a12 OS hybrids create a game improvement club that is substantially more forgiving while producing a hotter ball flight for more distance. Ultra thin face, perimeter weighting, and low CG make the a12 OS incredibly easy to hit. Addition of Velocity Slot Technology for substantially more forgiveness and better launch conditions. Spring-like effect across the entire face creates faster ball speed and better playability from various lies.Compared to the Idea a12, the OS version is 14% larger and has a higher launch angle with more forgiveness attributes.