These delightful dragonfly door knockers are cast in brass and then nickel plated.
The dragonfly's wings are intricately detailed and hover over the door while the head of the dragonfly is used to rap onto the striking plate. The door knocker is hinged at the end of the tail. The head and tail are the only parts that touch the door.
Sizes: 160mm wide (6 1/4") x 130mm (5 1/8") high over-all x 30mm (1 1/8") projection. The wings stand 18mm (3/4") away from the door.
The door knocker is attached by 2 bolts that are approximately 95mm (3 3/4") apart.
Image courtesy @ourdownhamhome