The Adams Redline Irons use an ultra thin face design to get you more distance down the fairway. To give the Redline irons a bit more forgiveness, Adams Golf used deep cavity weighting. That positions the weight back and low in the irons club head. Using Thermoplastic Polyurethane (TPU) allows Adams Golf to create a thinner club face that gives you a better feel and has more elasticity. Features: Ample sole width helps eliminate fat-shots TPU Insert gives great feel with excellent feedback