The Nike Slingshot OSS (Oversize Slingback) is an extension of the highly-acclaimed Slingshot irons. Nike Golf has moved the Center of Gravity (CG) further beyond the face resulting in Air CG+ by deepening the Slingback design, widening the Dual Glide sole and incorporating a lighter, hotter Cryo Steel face. As such, the Slingshot OSS boasts a centre of gravity position that is well beyond the thickness of the clubface, making it easier to hit the ball higher, longer, more accurately and with softer-landing shots. Nike Golf has saved 29 grams of weight savings from the ultra thin Cryo Steel face. This weight has been placed further back in the clubhead's new Oversize Slingback as well as lower in the wider Dual Glide sole. All of this combines to enhance perimeter weighting and increase the Moment of Inertia, which helps resist clubhead twisting on impact for more forgiveness. The Cryo Steel clubface is thinner, stronger and creates a hotter ball speed than conventional stainless steel. A robotically controlled laser weld maximizes the Cryo Steel faceplate size to create a large/responsive sweet spot. Through 3-D Flow Weighting, the Slingshot OSS irons have weight strategically and uniquely distributed in each clubhead within the set. Long irons have weight concentrated low, rearward, and in the heel to facilitate squaring the clubhead and getting the ball airborne. As the club numbers increase throughout the set, the Slingback design incrementally shifts higher and towards the toe to precisely calibrate trajectory and spin rate to prevent shots from ballooning while maintaining the ability to hold greens. To assist in delivering crisp, authoritative shots, the Dual Glide sole has been engineered to provide the clubhead with smooth flow through the impact zone. The wide constant sole width of the Slingshot OSS irons makes it easy to get the ball airborne and increase the effective bounce to help prevent digging and "fat" shots. The bevelled trailing edge of the sole reduces turf drag and the risk of thin shots. The graphite shaft is the iDiamana-cw Light/Constant Weight Graphite Shaft by Mitsubishi Rayon, a distinct graphite shaft is made for each numbered clubhead while maintaining the same static weight throughout the set (lightweight - low to mid 70 grams depending on flex). This specifically tuned shaft provides optimum tip flexibility/stability, trajectory and increases clubhead speed.