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[Smat Electric Deadbolt] Don’t worry forget or lose your keys with this Keyless-entry electronic deadbolt lock, you can get in with pre-set digital codes, and also you can unlock with mechanical keys for back up
[Easy to Install] Compatible with exterior doors where keyed entry & Fits most standard residential door(door thickness of 1.49 inch to 1.96 inch); just remove the old knob lock,no need to drill hole, install fastly with just a screwdriver