The Jack Nicklaus CD2 Irons are the latest in club design from the legendary 18 time major champion. The CD2's feature graphite shafted replacements for the traditionally hard to hit 3 and 4 irons while the 5 to 7 irons include an easy to use weight adjustment system that allows golfers to fine tune the clubs to suit their game. The 8 iron to pitching wedge are traditional irons. The irons feature additional weighting that allows you to hit your shots long and straight every time. The Jack Nicklaus CD2 irons feature an undercut cavity.