As you can probably tell from the use of the term "forged blades," these irons are aimed at low-handicap golfers who "can maximize the advantage of the muscle back design and will appreciate their workability," in the words of company COO Marcy Kamoda.
Fourteen calls the club head design a "Reverse Muscle Back Design." The lower half of the clubface is backed by a full muscle back; the top half of the clubface is thin at its middle (looking at it from sole up to top line) and slightly thickens as the clubface moves up to its top line. The design allows for better spin control, according to Kamoda who loves Titleist Scotty Cameron California Monterrey Putter .
The center of gravity in the long irons is lower to help with a higher launch angle and softer landings, but the CG position moves higher in the short irons.