picklock

Noun

1. A device designed to pick locks.
   • Marry, sir, he hath offended the law; and, sir, we take him to be a thief too, sir, for we have found upon him, sir, a strange picklock, which we have sent to the deputy. - c. 1603–1604 (date written), William...
2. One who picks locks; a thief.
   • 1664-1667, Jeremy Taylor, Dissuasive from Popery a picklock of secrets