picklock

plural picklocks

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 Shakespeare, “Measure for Measure”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act III, (please specify the scene number in lowercase Roman numerals)]

2. One who picks locks; a thief.

   1664-1667, Jeremy Taylor, Dissuasive from Popery a picklock of secrets