noun (n)

• fastener consisting of a metal ring for lining a small hole to permit the attachment of cords or lines(noun.artifact)

  Synonym:
  cringle, eyelet, grummet, loop
  

  source: wordnet30
• A ring formed by twisting on itself a single strand of an unlaid rope; also, a metallic eyelet in or for a sail or a mailbag. Sometimes written grummet.(noun)

  source: webster1913