The Adams Idea Tech a4 irons are a mixed set of two hybrids and forged irons. The hybrids feature the Boxer technology that help popularize Adams hybrids, increasing Moment of Inertia and distance. The irons are forged from 8620 carbon steel to deliver a soft feel. The patented Quad-Cavity on the back of the irons distrubutes weight around the perimeter of the clubhead, resulting in a higher Moment of Inertia. The face features milled grooves for optimal spin in any conditions.