Patented device – “hidden door chain”

”Hidden door chain” is a device for door protection that allows safely opening the door a little and prevents unwanted break-in. You will be able to open the door to talk or take your mail and not be afraid that someone will break an entry.

Advantages of the “hidden door chain”:

• Withholds the load up to 1800 kg.
• Invisible and inaccessible from the outside, therefore impossible to cut with any tools in attempt to break in through the opened door.
• Fixed in two points – top and bottom of the door frame (on the hinges side). It provides double strength.
• Can be locked or unlocked only when the door is completely shut.
• Does not impair the view of the door.

Latest technologies can be installed in your security doors!

Security doors with finger print or remote control lock