Deinonychus had three long slender fingers that were slightly divergent or subparallel, equiped with slim and sharply pointed claws. The fingers were about equally robust and the hand was overall about half the length of the hindfoot (Thulborn, 1990).

Deinonychus's arms were long and gangling and the hands were better adapted for grasping and holding with its opposible thumb (Desmond, 1975), and modified wrist joints that rotated enabling the hands to turn in toward eachother, thus they could seize their prey using both hands together. Humans, certain other mammals, and one other related dinosaur (Velociraptor) were known to have such wrist mobility (Wilford, 1985).