agraffe

1. A hook-and-loop arrangement used for a clasp on armor and clothing.
2. A cramp iron for holding stones together in building.

[French agrafe, from agrafer, to hook onto : a-, to (from Latin ad-; see ad-) + grafer, to hook (from grafe, hook , from Old High German krāpfo).]

Keystone decorated with relief sculpture.

[uh-GRAF] A metal clasp used to hold the temporary cork in place during bottle fermentation when making sparkling wine via the methode champenoise. The agrafe has, in most instances, been replaced by the crown cap.