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Sliding Door Hook Lock With Key Sliding doors look stylish and elegant in any setting However, they can be difficult to secure. Simple bolts will not suffice, but there are many locks that can be used to secure sliding doors. These lock systems that are mechanical do not require batteries or electricity and are simple to install. They have basic PIN access, but do not have the remote features that smart locks have. Keyed There are many keyed locks that can be used to secure sliding do