US Patent 7255650 Golf club head with alignment guide

A golf club head has a cavity for receiving an alignment guide or insert having parallel grooves separated by parallel ridges. The club head includes a face member with a front surface arranged for impacting a golf ball. The insert is oriented such that the parallel grooves and ridges are perpendicular to the front surface of the face member. The insert provides a visual guide for aligning the club head to the intended target that is highly visible under a variety of ambient lighting conditions. The insert may be selected from a plurality of inserts having different weights.