Patent ID: 6997818

Claim:
A golf clubhead comprising a main body, and a face member fixed on the front of the main body to form a clubface, the main body formed by casting a metallic material as an integral composite molding, including a main shell portion having a hollow, an upwardly protruding hosel portion through which a shaft inserting hole is provided, a tubular inner extension of the hosel portion through which the shaft inserting hole extends, the tubular inner extension having an outside diameter and protruding into the hollow from the inner surface of the main shell portion, and a single bridge having a thickness less than said outside diameter and formed between the tubular inner extension and the inner surface of the main shell portion, the bridge having a length in a range of from 5 to 30 mm so that a part of the tubular inner extension is separated from the inner surface of the main shell portion, and a length of said part of the tubular extension separated from the inner surface is in a range of from 5 to 40 mm.