Patent ID: 8328658

Claim:
A golf club head comprising: a striking face for striking a golf ball; a crown extending rearwardly from an upper portion of said striking face; and a sole extending rearwardly from a lower portion of said striking face, the sole comprising four rails protruding from the sole running longitudinally from the striking face towards a rear portion of said golf club head, and wherein: the golf club head sits properly on even ground using the second and third rail as contact points with the ground, sits properly on uphill inclined ground using the first and second rail as the contact points, and sits properly on downhill declined ground using the third and fourth rail as the contact points, and further wherein each rail presents a surface to the ground comprising two substantially straight longitudinal edges defining an offset angle α, β, σ, and γ of the first, second, third, and fourth rail, respectively, wherein α and γ are each between about 17.5° and about 22.5°.