"XXIO Prime irons boast the lowest and deepest CG ever used in a XXIO iron, leading to a higher launch and more forgiveness, partially a result of faces that have been lengthened near the sole.
Their soles are also made with a tungsten-nickel weight it weighs 28 grams in the 7-iron and a high-density, tungsten-nickel inner weight in the long irons, as well. The iron bodies are made from 630 stainless steel with a mirror, satin and high-gloss, bead-blast finish. Total weight of the clubs, like the rest of the line, are very light, coming in at 339 grams (5 and 6 iron) and 349 grams (7-9 iron).
This Iron set comes with XXIO Prime SP-900 graphite shafts which made with premium materials, including Toray T110G, and use different constructions in the tip, mid and butt sections to improve performance. Key to their design are shock-absorbing, flexible tip sections, which can help golfers create more club-face closure at impact to increase draw bias.