Synchron SP6 Integrated Hybrids & Irons: Designed exclusively to replace the harder-to-hit long irons, each Synchron SP-6 is designed to provide a higher launch angle, improved accuracy and more consistent distance gaps with the remainder of the conventional irons. The neutral-biased design features an inverted crown and the same alignment aid found in the rest of the Synchron SP-6 woods. The sculpted sole design reduces turf drag to make shots off any course condition that much easier. Uses a .370" shafts and designed to be built at the same length as a standard iron. <P> Designed to be integrated with the SP-6 Hybrids, these irons will blend beautifully together to make that perfect set! The wide sole and the deep muscle positioned strategically in the cavity will provide not only a high ball flight with pinpoint accuracy to the green, but will feel more solid upon impact