LOCKING-SYSTEM-Double locking refers to a locking mechanism in which a lock has two locking points that must be engaged in order for the lock to be secure. Hardened shackles-are commonly used in high-security locks such as padlocks, bike locks, and outdoor gate locks. They are also used in industrial and commercial settings where the lock is exposed to harsh conditions and a higher risk of tampering or vandalism. These types of shackles are generally more secure than regular shackles and can withstand more force, this is why they are commonly used in high-security applications. Lever Technology- Lever lock is a type of mechanical lock that uses 5 levers to secure the lock mechanism. The levers act as obstacles that must be correctly aligned in order for the lock to open. Each lever is a small metal bar that sits in a chamber within the lock. When the correct key is inserted, it raises or lowers each lever to the correct position, 5 lever locks are considered to be very secure and are often used in commercial and industrial settings.