Engineered for Modern pre-drilled Doors without the use of adapters, everything needed is included * Contains All hardware needed to install right out of the package, including instructions * Exclusive Porcelain Ceramic Door Knob Porcelain Ceramic with Brushed Nickel hardware Door Knob Set * Finest Antique Reproductions-The latch set is engineered to fit both 2 3/8" or 2 3/4" backset * 40 years of experience making hardware