Antique Type 12 Point Fluted Depression Crystal & Brushed Nickel Passage Door Knob Set for Modern Pre-drilled Doors. This Hardware Offers Features Only Found in Much More Expensive Sets, Inter-rose Liners Conceal Connecting Screws on Rosette Connecting screws for both 1-3/8" and 1-3/4" door thickness. A perfect ORIGINAL of the Antique or Modern periods Guaranteed best Quality available in this price range DIY easy to be installed by home owner, includes instructions 40 years of experience making hardware for American market