What is the safest front door lock is a high security deadbolt with strong door and frame reinforcement, not just lock alone. Safest combination is BHMA Grade 1 single cylinder deadbolt from reputable brand like Medeco, Mul-T-Lock, Schlage B60 or Schlage Encode Plus Grade 1, or Yale Assure Grade 1, paired with reinforced strike plate with 3 inch screws into stud, door frame armor, and solid core or steel door. Medeco and Mul-T-Lock are considered safest for pick and bump resistance due to patented key control and sidebar mechanisms that resist picking, drilling, and bumping far better than standard locks. For smart locks, safest is UL 437 rated high security smart lock with AES encryption, two factor authentication, and Grade 1 rating such as Schlage Encode Plus or Yale Assure Lock 2 with Z-Wave module. However, lock is only as strong as door and frame, so reinforce with door jamb reinforcement kit, hinge bolts, and security film on glass sidelights. Use single cylinder with thumb turn inside for fire safety, double cylinder only if glass nearby and allowed by code. Keep spare key secure. Safest lock balances physical resistance to forced entry, pick resistance, and digital security if smart.
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