Edel SMS Custom IronsYOUR IRONS CAN'T DO THIS. The new SMS (Swing Match System) Irons are unlike any irons on the market. These irons feature Swing Match Weighting. What is Swing Match Weighting? Simply put, it is the biggest leap in iron technology and customization that we've ever seen. By moving the heaviest of the three weights to the ideal position for your swing, it enables total clubface control. That can mean eliminating your miss right or left, improving face