Wide function
Great for outdoor activity, camping, fishing, hiking, traveling, keychain, fall protection system, anchor setting, rappel, climbing, rescue and so on.
Easy to use
A simple twist the barrel and push against the spring load will open the device. Automatic re-locking when you release the pressure.
Avoid accidents that you may forget to close it when you climbing, especially for a novice, it is a better choice when you are learning. Safer and more convenient to work.