Crisp, consistent impact, a solid feel and a flighted trajectory with added forgiveness are the result of an aerospace-grade aluminum insert (AlumiCore™) joined to a forged 1025 carbon steel body and 17-4 stainless steel laser-cut face. To deliver precise, reliable distance and performance across every club, the face is engineered with MicroMax™ grooves.
The price of $1749.99 is for a seven club set of i59's with  steel shafts.