An adjustable customized golf club, e.g., a golf putter, as well as a method for using the club, wherein the club has a head, a striking surface attachment, and one or more lock fittings that positively lock the striking surface attachment to the head. The striking surface attachment is one of several selectable attachments, each with different performance characteristics, e.g., rebound. The one or more lock fittings positively lock the striking surface attachments to the putter head such that the club components are firmly fixed, yet are still quickly removable and replaceable. In a representative embodiment, the striking surface attachment can be removed by hand and without tools. A golfer quickly changes the striking surface attachments without losing the feel of the prior striking surface attachment, thereby enabling the golfer to realistically compare the differences between the attachments before selecting and playing with a particular striking surface attachment.