mind like a steel trap, have a

have a mind like a steel trap

To be able to understand or grasp information quickly. David has a mind like a steel trap, so if you give him the instructions, he'll follow them perfectly.
See also: have, like, mind, steel, trap
Farlex Dictionary of Idioms.

mind like a steel trap, have a

Be very quick to understand something, as in Aunt Ida may be old, but she still has a mind like a steel trap. This simile likens the snapping shut of an animal trap to a quick mental grasp.
See also: have, like, mind, steel
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • have a mind like a steel trap
  • have a mind as sharp as a steel trap
  • (as) sharp as a steel trap
  • on the uptake
  • quick on the uptake
  • a bit obtuse
  • be quick on the uptake
  • within grasp
  • cotton on to (something)
  • cotton on