It restrains a suitable entrance door while it is opened a limited distance.
Add a Secondary Opening Restraint to Entrance Doors
A door chain provides a secondary restraint while an entrance is opened part way. MacBlair stocks door chains for suitable domestic entrance doors where the leaf and frame can accept secure fixings.
Check door and frame construction, opening direction and the position of other locks. The chain must be reachable by the user but kept away from glazing, weak panels and moving hardware.
Use fixings suited to solid structural material, align both plates and test the travel. A chain is an additional measure, not a replacement for the main lock or safe visitor procedures. Check the wider door furniture range for compatible parts, and match the fixing arrangement with suitable door hinges where the installation requires them.
Door Chain FAQ's
No. Door material, frame strength, opening direction and user access must be suitable.
No. It supplements rather than replaces the properly specified entrance lock.
Place it at a reachable height on solid fixing points, clear of other hardware.
Do not add hardware that could delay escape or conflict with fire and accessibility requirements.