Fit & Design: Newest iteration of the popular Elevate series iron shafts Designed for players seeking the stability of steel in a lightweight shaft that provides higher trajectories, increased spin and a solid feel Regular Flex: Features a .580" butt diameter for increased load and ball speed Stiff Flex: Features a .600" butt diameter for increased stability to complement faster swing speeds Note: Weight listed in the spec box is the shafts trimmed weight. Golf Shafts from the True Temper brand.