How to choose a Padlock: Types And Features : Door Padlock
Quote from Article entitled How to choose a Padlock: Types And Features:
To understand what type of padlocks are the most reliable, one should consider their internal structure, namely, the principle of operation of the locking mechanism. This mechanism is responsible for the basic function of any lock - it locks bolts, maintaining doors and safes locked, cabinets secured.
The full version of the article can be found here.