The Nike SQ (SasQuatch) Sumo irons are game improvement irons designed using the same ground-breaking technology behind the SUper MOment (SUMO) of Inertia. As in all SQ Sumo products, it begins with geometry. Nike Golf's trademark PowerBow weighting creates a high moment of inertia (MOI) by repositioning weight low and deep to enhance stability. The MOI in the Nike SQ Sumo irons is the science behind straight and long - producing higher, longer, straighter and softer landing shots. The Nike SQ Sumo irons, which are packed with forgiveness, feature a long blade length and wide sole. A responsive ultra thin Cryo Steel face plate (Irons #4 - 7) is welded around the perimeter of the clubhead to increase the coefficient of restitution (COR) across the face for greater distance, further amplifying the forgiveness across the hitting surface. By nature, a thin-face, extreme perimeter weighted golf club head has the potential to create a harsh feel. For this very reason, the Nike SQ Sumo irons include a TPU polymer insert to prevent unwanted vibrations at impact for an improved feel.