Patent ID: 8088022

Claim:
An iron-type golf club head, comprising: a body defining a top line comprising a recess, wherein the body is formed of a first material with a first specific gravity; the recess having a varying depth in the heel to toe direction; the body further comprising a striking face, a hosel, a heel, a toe, and a bottommost portion adjacent to the striking face, extending between the hosel and the toe of the club head, defining a sole; an insert positioned within the top line recess, wherein the top line insert is formed of a second material with a second specific gravity; wherein the second specific gravity is less than the first specific gravity, and wherein the club head satisfies the relationship: I zz ≧CG z ×170 where I zz is the rotational moment of inertia about a vertical axis and has units of g·cm 2 and CG z is the center of gravity and has units of mm; wherein the top line insert saves an amount of weight that allows the saved weight to be located to the heel and toe of the golf club head.