Emtek Privacy Hampton Square Rosette Door Knob Set is a contemporary style privacy door knob suitable for double doors and interior/room doors. The set includes hardware, instructions, and fixings. The crystal flat black knob is made of brass and has a glossy finish. The knob has a diameter of 2.75 inches and the rosette is oval-shaped. The product is easy to install and suitable for residential use. The Emtek Hampton model is designed with universal/reversible handing and is 4.5 inches long and 2.5 inches wide.