Black Cast Iron Door Knocker Hand Fist Rustproof And Weatherproof Finish 4in High X 1-15/16in Wide Door Knockers that make a great first impression. Pick out your Door Knockers here today. Iron Door Knocker. Step-up your curb appeal and make your entrance a knockout! 4 H x 1 15/16 W. Weatherproofed Exclusively with RSF baked-on finish Tarnish resistant keeps a luxurious matte finish Maintenance-free hardware