Enjoy the simple fun of spinning your keys or take your spinning skills to the next level with this high quality aluminum keychain flower power spinner. Aluminum is a durable metal that should provide years of smooth spinning. The opening for your finger is 17mm which is just over a ring size of 6.5. Dr SpinZ stands behind these spinners and is constantly looking to improve. Please contact if you are not fully satisfied or if you have recommendations for future designs.