Copper Claddagh Door Knocker. Add a touch of Love and Friendship to your front door or entry way. 5″ x 4 1/2″. Mounting bolts to attach the door knocker and the brass striking stud are included. Mounting Hole Spacing = Approx. 4 1/4″ on Vertical. Antique Copper. 2 screws approx. 3/8 inch in diameter and 2 5/8 inches long and can be cut to fit.