Patent ID: 8393976

Claim:
An iron-type golf club head, comprising: a body defining a top line comprising a recess extending along the top line no further than about halfway around a toe of the club head toward a sole of the club head, and wherein the body is formed of a first material with a first specific gravity, wherein the recess comprises a channel having a substantially rearward-facing surface facing a substantially forward-facing surface when the club is at address; 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 different 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.