With a mid-width stepped sole design, the Cobra S2 Irons are multi-material in construction with a new cavity design that employs lightweight polymers to help improve the weighting characteristics and boost the moment of inertia (MOI).
What are the materials used in the "multi-material" construction? The clubhead is 431 stainless steel; the topline and a toe insert are made from a polymer compound; a sole insert is urethane; and a back plate of aluminum is designed to lessen vibration.
The Cobra S2 Irons men's set includes 4-PW with gap wedge also available, in either graphite or steel shafts. Women's and Senior sets are also available with 5-PW plus gap wedge and sand wedge and with graphite shafts.
Stock shafts are the Cobra/Aldila DVS-2 graphite and Nippon NS Pro 1030H steel. Sets began shipping Sept. 1, 2009, with MSRPs of $744 with steel shafts and $872 with graphite shafts. Visit cobragolf.com for more info.