Kwikset 665 Deadbolt - Keyed Both Sides - with Pin & TumblerFeatures For use on exterior doors where keyed entry and security is needed Deadbolt operated by key on both sides Comes with 2 keys Deadbolt Latch has 2 interchangeable faceplates round corner and square corner ANSI BHMA grade 3 certified Latch has adjustable backset 2 3 8" to 2 3 4" to fit all standard door preparations Includes round deadbolt strike 1 inch deadbolt throw Easily installs in minutes with just a screwdriver Lifetime mechanical and