The PING Zing Beryllium Copper (BeCU) irons are a forgiving iron set with a soft feel. These irons feature extreme perimeter weighting that allows the clubhead to reduce twisting at impact. The BeCU irons have a thinner topline than their Zing predecessors as well as a softer feel due to the different head material. The sole is designed to cut through any lie so no matter where you find yourself you can make solid contact for consistent performance.