agraffe

noun

1. a small cramp iron.
2. a clasp, often richly ornamented, for clothing or armor.
3. a device, as a hook, for preventing vibration in the section of a piano string between the pin and the bridge.
4. (in classical architecture) a sculptural relief on the face of a keystone.

noun

1. a fastening consisting of a loop and hook, formerly used in armour and clothing
2. a metal cramp used to connect stones