Adams Idea Tech Men's A4OS Complete Hybrid Set Dual tungsten perimeter weighting in the heel and toe for maximum forgiveness. Magnesium crown is 77% lighter than stainless steel and delivers better launch conditions. Increased ball speed and greater distance through pull face construction and high strenght maraging steel face Vibration dampening system reduces vibration by 30% for a soft feel with better sound High performance milled grooves provide optimal spin from all conditions