Could be a bead cap - it is a cupped set of fingery stamens on a dished flower - with a hole through the middle. I think you could bend the fingery bits in to hold a bead (about 4mm) in the center. Plated steel.
14mm x 14mm x 5mm Hole size is approx. 1mm. Inside diameter (ID) is 4 mm. By the pack of 2.
