The quality of style and show. Baldwin Estate Collection tells people that you live to a higher standard. While meticulously detailed for architectural accuracy, this is no hollow beauty. Select from many other products and accessories in the collection to coordinate your entire home and hardware decor package. The single cylinder deadbolt locks and unlocks from the inside with a turn-button, and from the outside with a key. The knob itself does not lock or unlock. The emergency egress function allows the latch bolt to be released by turning the interior knob, without unlocking it on the outside. Solid forged brass. Concealed mounting system. Accommodates door thickness between 1-3/8" (35mm) to 1-3/4" (44mm).