eye·let /ˈaɪlət/
  小孔,孔眼,針眼,金屬圈
  Eye·let n.
  1. A small hole or perforation to receive a cord or fastener, as in garments, sails, etc.
  2. A metal ring or grommet, or short metallic tube, the ends of which can be bent outward and over to fasten it in place; -- used to line an eyelet hole.
  Eyelet hole, a hole made for an eyelet.
  Eyelet punch, a machine for punching eyelet holes and fastening eyelets, as in paper or cloth.
  Eyelet ring.  See Eyelet, 2.
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  eyelet
       n 1: a small hole (usually round and finished around the edges)
            in cloth or leather for the passage of a cord
       2: fastener consisting of a metal ring for lining a small hole
          to permit the attachment of cords or lines [syn: cringle,
           loop, grommet, grummet]