1) An iron bar with one end bent and sharpened to a beak, used as a lever. Later, crow-bar was more common.
1559 one iron gavelock, one hacke, a crawe, a chesill, Hipswell
1599 ij plough shackles ... & one yron crowe, Rawmarsh
1678 3 axes, 3 adges, 6 wombles, 2 iron craws, with other small work tooles, Selby.