Have peace of mind when leaving your home or business by installing Lockwood 001 double cylinder deadlatch knob. This deadbolt deserves every bit of attention it receives because of the multiple benefits it offers. Lockwood 001 double cylinder deadlatch incorporates innovative safety features including safety release™ and LockAlert® offering market-leading performance and reliability for your home. 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, and Passage Mode - Free to enter from outside and free to exit from inside Incorporates Lockwood's patented lockalert status indicator that shows the lockset mode at a glance| Conforms to the security and durability requirements of Australian standard AS4145.2-2008 | SL7D8C6| 11 concealed anchorage points and a door frame strengthener for high-security protection