The Ludlow Foundries Covered Standard Escutcheon Black Antique has a 40mm diameter. This is to be used with a 3 or 5 lever mortice deadlock or sashlock; some of these can be found in the related products or in the Hinges, Locks & Latches category. Malleable Wrought Iron Escutcheon This escutcheon is made from malleable wrought iron and comes with a 10 year mechanical warranty. Regular maintenance is essential as malleable wrought iron is susceptible to rusting. We suggest frequent oiling of the antique black hardware and an occasional application of clear wax to maintain the gloriou...