gimlet
noun /ˈɡɪmlət/
  /ˈɡɪmlət/
- a small tool for making holes in wood to put screws in
- (figurative) eyes like gimlets (= looking very hard at things and noticing every detail)
 
Word OriginMiddle English: from Old French guimbelet, diminutive of guimble ‘drill’, ultimately of Germanic origin.