Box strike with concealed cross-grain doorframe strengthening screw. This product incorporates Lockwood's patented Lock - Alert status indicator that shows the Lockset mode at a glance. Its secure mode lets you lock from the inside and outside. Its safety mode lets you lock from the outside and free to exit from the inside. The passage mode feature lets you enter freely from the outside and to exit from the inside. - Designed in Australia, the Paradigm 005 Double Cylinder Deadbolt represents the pinnacle in deadbolt security products. It conforms to the security and durability requirements of Australian Standard AS4145.2-2008 | SL8D8C6K5. Multi-mode slimline deadbolt providing safety, security and convenience. This simple to install Paradigm 005 Double Cylinder Deadbolt has a high-security cut resistant stainless steel bolt.DualSelect - Turn the key for safety mode. Turn the key further to select secure modeSafetyRelease lets you automatically unlock the internal knob upon entry minimising the risk of being locked in - Kinetic Defence is bump and pick resistant - Counterbalance Bolt proportionally distributes the load between the door and door frame