What are the small holes in the door frame on both sides of the security door for?

Updated on Security door 2024-08-17
3 answers
  1. Anonymous users2024-01-24

    You may be talking about the expansion hole: the function is to drill a hole in the wall through the drill bit during installation, install the expansion pipe, and finally cover it with a matching plastic cover.

  2. Anonymous users2024-01-23

    What is the small hole next to the gate in the countryside used for? What's the point?

  3. Anonymous users2024-01-22

    It is used to fix the security door, and install expansion screws in the small hole to fix it with the wall. Finally, the hole is covered with plastic.

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