Lovely celtic round cloak clasp. Fibula, penanular. This is a screw on style which can beworn on multiple garments. It includes an endless chain which can be wrapped two, three or 4 times depending on your preference.All screws and washers and endless chain  are also included with this screw on style.   each round piece measures 1.5 inches left to right and 1.5 top to bottom .