New to me. I can remember seeing champagne bottles using such a closure a long time ago, but doubt they are still used.
agraffe or agrafe
n.
5Fr agrafe < agrafer, to hook < OFr agraper, to fasten < grapon, hook < Frank *krappo (see GRAPE); form infl. by OFr grafe, pointed tool < L graphium, stylus < Gr grapheion, a chisel6
1 a hook and loop, used to fasten armor or clothing
2 a metal bracket used in building to hold stones together