Abstract: An implement for breaking open nuts by cracking instead of crushing them; the device including a concave stationary jaw, in which the nut is seated, and a concave slidable jaw for moving against an opposite side of the nut, the slidable jaw being supported on a screw-threaded shank that rotates in a stationary threaded opening so to advance the movable jaw a specific distance that is enough to crack open only the nut shell and not the nut meat.