Door Security Chain, Stainless Steel Finish

A door security chain in a stainless steel finish. It is the simple fitting that lets a door open a few inches while the chain stays hooked, so whoever is inside can see and speak to whoever is outside before deciding to open properly. The stainless finish is the reason to pick this one over a plain plated chain, which tends to mark and go dull on a door that is handled every day.

It goes on flats and maisonettes, hostel and guest house rooms, offices with a street door, and shop back doors. Landlords and caretakers fit them across a block at once, security firms specify them on client premises, and hardware retailers sell them one at a time to householders who have had a knock at night they did not like.

Sold as a single item in the one finish. The supplier publishes no dimensions for it, so check it against your own door and frame and the fixings you will need before you buy for a whole block, and remember a chain is a deterrent at the door rather than a lock: it does not replace the mortice or the deadbolt.