Designed in Australia, the Paradigm 005 Double Cylinder Deadbolt represents the pinnacle in deadbolt security products. - Incorporating innovative safety features including Safety Release , Lock - Alert and Dual - Select , the 005 Double Cylinder Deadbolt is ideal for residential and architectural applications. Features of the 005 Double Cylinder Deadbolt Conforms to the security and durability requirements of Australian Standard AS4145.2-2008 | SL8D8C6K5 Multi-mode slimline deadbolt providing safety, security and convenience Simple to install High security cut resistant stainless steel bolt Available in round or square designs Box strike with concealed crossgrain doorframe strengthening screw LockAlertThe 005 Deadbolt incorporates Lockwood's patented Lock - Alert status indicator that shows the Lockset mode at a glance. The lockset can operate in three modes: Secure Mode - Locked from the inside and outside. Safety Mode - Locked from the outside and free to exit from inside. Passage Mode - Free to enter from outside and free to exit from inside. Dual - Select Turn the key for safety mode. - Turn the key further to select secure mode. Safety - Release Automatically unlocks the internal knob upon entry minimising the risk of being locked in. Anti-Corrosion - Successfully tested in accordance with AS2332.3.1:2001 neutral salt spray test. Kinetic Defence Bump and pick resistant. Counterbalance Bolt - Proportionally distributes the load between the door and door frame. Retrofitable - Replace your existing Deadbolt. - Fits 54mm hole.60-70mm adjustable backset.32-48mm door thickness. 2 Keys Included - Can be keyed alike to other Lockwood door locks.