For use with our 45L and 72L Rapid Range Security Crates, you can be rest assured the contents are secured inside once you have attached the Snap Lock Clip. Using one per side (2 per crate) creates a tamper evident seal that will not easily be removed. Perfect for protecting your valuables and documentation while in transit or away in storage. Once you are ready to open the Security Crate simply snap the pin and twist to remove. Single use only.