Lockwood Matt Black 001 Double Cylinder Deadlatch Knob

The Lockwood 001 Double Cylinder Deadlatch is a high-security knob deadlatch for inward opening entry doors. Key operation from both sides gives maximum security, with hold-back function for passage use when you're at home. 11 concealed anchorage points plus a door frame strengthener resist forced entry. LockAlert shows lock status at a glance, and Safety Release automatically unlocks the inside knob on key entry from outside. Built around a cut-resistant stainless steel bolt with 18mm projection, brass 5-pin cylinders (78,000 key combinations), and Kinetic Defence bump and pick resistance. Supplied with a open in (timber framed) strike to suit. Fits doors 30-45mm thick. Tested to AS4145.2-2008 (SL7 security, D8 durability). Backed by Lockwood's 25-year mechanical warranty.