ping i20 irons are progressively shaped, sized
The i20 irons pack in a lot of new design tweaks from previous i-series models. The biggest visual change from previous i-series irons is the "toaster" style tuning port in the cavity. Previous models used an elliptical PING logo-ed badge in the cavity. The vertical Custom Tuning Port (CTP) and stabilization bars in the cavity are also featured in the PING S56 irons. The stabilization bars help improve feel along with a thicker face in the impact area, while the vertical CTP construction allows for a lower center of gravity, different options for weight positioning and swing weight custom fitting. This CTP allows PING to customize the swing weight for players that use longer, shorter, lighter or heavier shafts. The weights vary from 3-28 grams.