Wilson Staff D100 Golf Iron Set All clubs are Super Light and Seriously Long and contain progressive design features for optimized ball flights throughout the iron set Lightweight, premium shafts and the progressive head shape design throughout the set make the D100 Irons the Right Light Larger face size for better overall look and setup and the sole widths are wider for higher launch and improved turf reaction on every stroke Larger, super game improvement type head offset in the long irons to help square the face and provide confidence in the address Topline mass is reduced so that it is wider, but significantly thinner from top-to-bottom, giving player's more confidence