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What Is the Key Truck? Locks A lock is used to secure a gate, door or lid to block entry by unauthorized persons. The operation of the lock is controlled by the use of a dial or key. Locks are available in a variety of sizes and styles which makes them suitable for various configurations. They can also be adapted to meet the specific needs of. The materials used in locks are assessed for their durability, aesthetics and function. Some are made of stainless steel
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