National Hardware - N336-700 V1915 Cooper Door Knocker - Matte Black They're manufactured from high strength

They're manufactured from high strength steel with a zinc-plated finish to build strong structural connections and come pre-drilled for the appropriate screw or bolt size needed

Each will come with 4 braces to pack

Installs with included mounting hardware in both left and right handed applications

Fit doors with clearance up to 2 inches

making it easy and intuitive to use

National Hardware - N336-700 V1915 Cooper Door Knocker - Matte Black They're manufactured from high strengthNational Hardware N336 700 V1915 Cooper Door Knocker Matte Black National Hardware's door knockers are designed to let others know you have arrived at the front door. Available in matte black, satin nickel or brushed gold. Instructions and mounting hardware included for installation. Surface mounted application for easy DIY installation.