The length of the creature itself, a fish or perhaps a dolphin, is around 8-3/4”/22cm and it is hinged onto a long bolt. On the back it is engraved: Handmade, F. Abela & Son, Malta, the “Malta” part being partially obscured as the letters go over an edge, plus there’s a Maltese cross. In addition, there’s a brass Maltese cross escutcheon and a brass washer. There is no nut to attach to the bolt, nor another part which the knocker would actually hit.This is very heavy... and of, frankly, stunning quality! The measuring tape shown is not included in the sale.