Our shaft extenders for graphite and steel shafts are made of high-quality nylon blended plastic. They are designed to extend one club (maximum 2" for swing clubs). We recommend high-strength golf club epoxy to secure the shaft extension into butt end of the shaft and then cut to length once the epoxy is cured. The stem of these shaft extenders can be sanded down (generally no more than 0.020") to fit smaller openings. These will work with graphite shafts as well as the 3 largest models will fit 0.560", 0.580" and 0.600" steel shafts respectively.
Please note: The OD is the outside diameter of the extender's stem which fits the corresponding inside diameter of the shaft.