The Stanley SDB205BRD is a security double beveling door bolt lock. It is a surface mounted latch that fits 1-3/8 and 1-3/4 inch doors, and is ideal for commercial and residential door security applications. This lock is constructed from zinc die cast for corrosion resistance and increased strength, and is suitable for any type of door material. The bolt locks securely into the keepers and can be deadlocked with a key to prevent tampering. The SDB205BRD easily installs with included mounting hardware, and is designed to provide excellent security without compromising on style.