One length one swing one consistent result cobras first ever single length irons set featuring new pwrshell technology provides simplicity in every swingone length set makeupconstant length irons have been re engineered for 7 iron weighting and are designed with optimised geometries designed for consistent trajectory and distance gapping from long irons to wedgespwrshell facemore distance more forgiving more precise a thinner stronger face and sole structure delivers our largest sweetz