7 inch solid brass antique bronze door knocker. Add a decorative appearance to outside doors. Solid brass gives maximum corrosion resistance. Can be personalized by engraving. 3-5/8 inch wide by 6-27/32 inch high. Mainly designed for use on doors 1-3/4 inches thick. The screw supplied can be cut to use on doors less than 1-3/4 inches. For larger doors use longer #8-32 machine screws, not included. Screw holes are 6-5/16 inch from center to center.