Universal Golf Shaft Adapter allows you to test different driver heads with the same shaft without having the pain of changing adapters which can lead to tip damage. Adapter comes with a screw that has to be installed in all driver heads except for Taylormade. Some of the different manufacturer cogs comes with a special screw that has to be installed in the driver head instead of the main universal screw. INCLUDES TAYLORMADE, TITLEIST, CALLAWAY, PXG, SRIXON, MIZUNO, COBRA AND PING COGS.