countersink_bit
1. [ noun ] a bit for enlarging the upper part of a hole
Synonyms: countersink counterbore
Related terms: bit
Similar spelling:   counterstain
  counter_tube
  countersignature
  counterintuitive
  counterstrike
  counterpoint
  counterperson
  countersubversion
  counterintuitively
  counterwoman
  countertenor
  counteroffer
  counterirritant
  countercheck
  counterpoison
  counterfeiter
  counterattack
  counteraction
  counter_check