agraffe

n. hook, clasp (as on clothing); ornamental relief on the keystone of an arch (Architecture)

An agraffe is a part found on some pianos. The agraffe is a guide at the tuning-pin end of the string, screwed into the plate, with holes through which the strings pass. It anchors the strings, ensures proper height and determines the speaking length of the string. Quality agraffes are usually made of solid brass but can be painted ar plated steel.
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n. (as on clothing) agrafe, hook, clasp; ornamental relief on the keystone of an arch, (Architecture) agraffe

n. staple, metal clip for binding papers

(n.)
A hook, eyelet, or other device by which a piano wire is so held as to limit the vibration.
  

(n.)
A hook or clasp.