Stiff Flex The Ping i530 irons feature a compact bladestyle head with longerdistance shots in mind The i530 utilizes a thin top line narrow sole and shallow face weight The increase in distance comes from an internal weight pad that provides a deeper and thinner facetosole transition ensuring more flexing and pushing mass down to lower the center of gravity for more ball speed GlobalGolfcom online store offers superior selection service and quality for your Ping golf Clubs needs