The Wilson Staff Di7 Irons have an even lower and deeper Centre of Gravity than previous models which of course help to hit the ball higher and further. They also have a wide sole (which in conjunction with a shallower face helps move the centre of gravity lower and further back) in a compact, powerful head design. The set of irons is designed for golfers with a handicap of 10 and over who will appreciate these benefits. There is also Electrometric paint coating in the back cavity which dampens vibration (reduced by 1/3), and results in a softer feel.