When installing deadbolts, which option is not recommended?

When considering the installation of deadbolts, using 3/4 inch screws is not recommended because they do not provide adequate strength and stability necessary for securing a door effectively. A deadbolt is a critical security feature, and the screws that anchor it should be long enough to penetrate deeply into the door frame and studs behind it. One-inch screws are generally preferred as they offer a more robust connection, reducing the risk of the lock being easily compromised.

Door thickness over 1.75 inches is acceptable, as deadbolts can be used on thicker doors with the right installation techniques and hardware. Single cylinder deadbolts are also standard and widely used, especially when there is a risk of the lock being tampered with or if there is no possibility of an intruder accessing the exterior side of the door. Thus, opting for longer screws ensures that the deadbolt functions effectively, enhancing overall security.