Yueton 6Pcs D Shaped Aluminum Locking Spring Snap Clip Hook Keychain Key Chain Screw Lock D-ring Keyring Hanger Material: Made from light weight aluminum alloy. Suitable for outdoor activity, fishing, hiking, traveling, keychain etc. With a spring loaded gate, can attach to a wide range of fixing points quickly and securely Color: We will send you six different colors by random. Not Recommend for Climbing Rock.