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Sliding Door Hook Lock With Key Sliding doors look elegant and stylish, but they can be difficult to secure. Simple bolts won't suffice, but there are many locks that can be used to secure sliding doors. Mechanical locks are simple to install and don't require electricity or batteries. They have basic PIN access but lack the remote features that smart locks provide. Keyed There are a variety of keyed locks available to secure sliding doors. They come in different sizes an