Unlike traditional padlocks that use keys or combinations, The CONTICARE PADLOCK 2 is a one-time padlock that uses a locking mechanism that can only be engaged once. Once the padlock is closed and locked, it cannot be opened without breaking the locking mechanism. Any attempt to forcibly open or break the padlock results in visible damage to the lock, making it evident that the seal has been breached.This feature ensures that the integrity of the sealed item is maintained. One-time padlocks are generally easy to use. They can be quickly snapped shut and locked without the need for additional tools, keys, or combination.