ERA BS 3621 High Security Nightlatches are recommended for external timber or composite doors. The BS 3621 standard is recognised as giving the high protection for highome and commercial use, approved by Insurance companies and the Police. Integral Cylinder housing/pull protects the cylinder from drill attacks. The cylinder has over 30,000 key variations and is constructed with anti Lockpick pins. The Nightlatch bolt has a 20mm throw for greater security and strength. The bolt automatically deadlocks when the door is shut to prevent credit card attacks. The generously sized internal, easy to use handle, can be locked which prevents the lock being operated when a winow pane is broken. The lock is opened from the outside via a key and by a handle on the inside.
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