Abstract: An interchangeable grip system for golf putters includes an inner sleeve installed on the butt end of a putter shaft, and a plurality of pre-manufactured outer grip sleeves adapted for universal removable installation on the inner sleeve. The look and/or feel of the putter may be changed by simply removing the outer sleeve and replacing it with an alternate outer sleeve. A threaded fastener secures the outer sleeve to the inner sleeve, and may further function to permit weight adjustment. A plurality of weighted fasteners is provided to allow for the overall weight of the putter to be adjusted. Each fastener is provided with a keyed head that requires a compatible tool or wrench for tightening and removal. A hand-tool is provided to allow for quick and easy removal of the fastener, and further functions to store various weighted fasteners to allow for weight adjustment.