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What Is the Key Truck? is a device to secure a door, gate or lid to stop unintentional entry. The lock's operation is controlled by keys or dials. Locks come in a variety of designs and sizes and are suitable for various configurations. They can also be modified to meet specific requirements. The materials used in locks are tested for strength and aesthetics as well as functionality. are made from stainless steel, while other locks are made from copper. This material is used to make