Brass Love Heart Door Knocker - Black 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 Width – 11cm  Door Knocker Height - 12cm  Striking Plate Width – 4.5cm  Striking Plate Height – 4.5cm  Screw holes distance - 10cm . 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