Mechanical keyless door lock
Mechanical Keyless Door Locks
They are with round knob which you can rotate. Numbers are written on circumference. By rotating clockwise & anticlockwise you set the particular number.
They are Simple and reliable. You don't require batteries.
Mechanical locks are with limited password length, usually 4 or 6 digits maximum. User can go on trying. There is no wrong password lockout.
You can use it inside the house where you require frequent opening / closing.
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