The Excel Hardware 3621 Standard Escutcheon Dual Chrome has a 53mm 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. This escutcheon is made from zinc alloy & has a dual polished & satin chrome finish - Orpheus, Chronos, Atlas, Artemis, Arc, Argo, Aura & Ultimo handles in the Excel Hardware range. Other Variations It is also available with a euro profile & this variation can be found in the related products.