Protect your home against intrusions with the Schlage Single Cylinder Deadbolt, which features multiple layers of solid brass and steel reinforcement to prevent hammer and crowbar prying attacks, as well as lock picking, sawing or cutting. The durable deadbolt can be installed on 1-3/8 inch to 1-3/4 inch doors and can be thrown by turning the inside unit or using 1 of the included nickel 5-pin keys with the exterior keyed lock.