The Collaborative International Dictionary of English v.0.48:

Cant hook \Cant" hook`\
   A wooden lever with a movable iron hook. hear the end; --
   used for canting or turning over heavy logs, etc. [U. S.]
   --Bartlett.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cant hook
    n 1: a peavey having a hook instead of a spike; used for
         handling logs