Knob LOCK No.620 1pc/bag

This is an auxiliary lock (key) for doorknobs (knobs). Simply attach it to the doorknob and your front door will become a one-door, two-lock door. For crime prevention when you go out! (Improved security) Doors without keys will become locked (with a key). This is an auxiliary lock (key) for doorknobs (knobs) that does not require tools or a padlock. This prevents people with dementia from going out unexpectedly. Prevents elderly people from wandering away. Prevents people with dementia from going out unexpectedly. Convenient for handing over keys between employees Keys can be stored inside the knob LOCK. Also recommended for property management in the real estate industry (management of vacant rooms and vacant rooms). It won't scratch the door, making it ideal for rental properties. This is a product to prevent peeping. The combination lock with anti-pry function allows you to set your favorite number from 10,000 possible combinations. Lightweight and sturdy! Made of high-strength resin material. Materials: Body: ABS, outer ring: ABS, cam: POM, back plate: iron, S45C zinc plating