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Sliding Door Hook Lock With Key Surface-mount locks can be used to lock sliding glass doors, cabinets, closets, lockers and bi-fold doors. They are safe from bumping and picking and permit you to control access with pin code or fingerprint scans that are biometric. Track locks attach to the rail of windows or sliding doors and prevent movement, although they're not as secure as other alternatives. Lockey C150 Digital Mechanical Sliding Door Lock The Lockey C150 mechanical digital keyless lock provides