Brass Love Heart Door Knocker - Nickel/Chrome Finish Complete With Fixing Screws . The door knocker is attached by 3 screws that are approximately 63mm between top and centre points and 63mm between centre and bottom point behind striking pate. Screws included. Screw length 5.9cm and will be visible on both side of the door. . Approximate Dimensions brass Love heart: Door Knocker Width11cm Door Knocker Height - 12cm Striking Plate Width4.5cm Striking Plate Height4.5cm . How to care for your Love Heart door knocker Your door knocker should just be washed with warm soapy water. Always avoid using abrasive materials which could scratch the surface