The Schlage Matte Black Double Cylinder Deadbolt adds an extra layer of security to your interior or exterior knob/knob. When finished in Matte Black, the deadbolt looks especially elegant. Plus, it's been designed and tested with strength and durability in mind. Use with 1-3/8 in. to 1-3/4 in. door Universal deadbolt fits 2-3/8 in. or 2-3/4 in. backset Guaranteed to fit on existing, standard pre-drilled doors Finish coordinates with popular neutrals like grey For more than 95 years, Schlage has offered durable door hardware in a range of unique style combinations to express any personality Deadbolt thrown or retracted by key from either side Bolt automatically deadlocks when fully thrown Lock and finish backed by limited lifetime warranty Easy installation with Phillips screwdriver Unique snap and stay design holds deadbolt in place while tightening screws Universal latches slide easily into place and require no tools or manual adjustments Highest industry ratings for residential security, durability and finish ANSI Grade 1 (Best) to provide maximum security 072018-01