The From the Anvil Ring Door Knocker Pewter has been drawn from a single piece of steel which makes it very heavy and strong. The ring width is 114mm, the ring length is 114mm, the fixing plate size is 121mm and the stud diameter is 26mm. Sold individually, it comes complete with fixings. Pewter Knocker The knocker has a pewter patina finish - this has anti-corrosion properties and can be used internally or externally. To remove dirt deposits, simply wipe over with a lightly oiled cloth from time-to-time and this will restore it to its original condition. Do not use any form of aerosol spray...