subs. phr. (old legal).The crow-bars and hammers used by sheriffs officers to force doors and locks. [ROQUEFORT: faire la clef du Roy, ouvrir les clefs et les coffres avec des instruments de serrurier.]
1816. SCOTT, The Black Dwarf, 173, 4. And what will ye do, if I carena to thraw the keys? Force our way wi the KINGS KEYS, and break the neck of every soul we find in the house.