Patent ID: 7794334

Claim:
A putter-type club head comprising: a main body having a sole portion and composed of an aluminum alloy material and having a density ranging from 0.90 g/cm 3 to 6.0 g/cm 3 and a mass ranging from 120 grams to 150 grams; a removable aft member having a central mass member, a heel arc arm and a toe arc arm, the central mass member having an indentation for scooping a golf ball, wherein the removable aft member is composed of a stainless steel material having a density ranging from 7.00 g/cm 3 to 10.0 g/cm 3 , and a mass ranging from 150 grams to 250 grams; and means for removably attaching the main body to the removable aft member; wherein the removable aft member ranges from 20 to 50 volume percent of the putter-type club head and ranges from 60 to 80 weight percent of the putter-type club head, and wherein the putter-type club head has a mass ranging from 300 grams to 400 grams; wherein the removable aft member only contacts a sole portion of the main body.