This is a shaft for a driver. It's a shaft that's not quirky at all. It is equipped with the [All Fit Sleeve]. By replacing a ring (sold separately) for around ¥500-700, you can attach heads from various manufacturers yourself. For example, if you buy rings for (Ping) and (TaylorMade), you can use both Ping and TaylorMade heads just by loosening the screw. You can find them by searching for "(All Fit Sleeve Ring)" on: - Rakuten - Yahoo Auctions - Amazon etc.