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The Security Door Chain acts like any other door chain – except when you want to gain access from outside or when there’s an emergency requiring immediate entry. A completely unique style of door chain, that can be fitted in the same position on a door as a conventional chain. The internal chain body engages with a standard rim cylinder on the outside of the door, thus enabling the chain to be disengaged with a key from the outside in an emergency. Where night latches are fitted, the same key could be used to operate both the door chain and night latch.
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