[Material: High-quality aluminum alloyAftermarket Golf Shaft Sleeve Adapter Golf all fit adapter sleeve include 1pc adapter + 10pcs rings compatible with Titleist/Taylormade/Callaway/Ping/Cobra/Mizuno/PXG/Nike/Srixon Right hand golf heads.The ring "PN" use for PING G400 driver and "PN2" fit for PING G410/G425/G430 driver heads. The adapter available for tip diameter 0.335" driver golf shafts The package include 2 extra screw for Cobra and PXG driver head If change the all fit adapter in your golf shaft you can use the 10pcs rings to change 9pcs different brand golf heads.so it is same as you have 8pcs driver for your ownwill bring great fun to your golf sporting!]