Abstract: A mechanical finger has a base. A proximal phalanx and a distal phalanx is provided with a first epicyclic joint between the base and proximal phalanx, and a second epicyclic joint between the proximal phalanx and the distal phalanx. A distal four-bar mechanism includes the proximal phalanx, the distal four-bar mechanism coupled to the distal phalanx. A nail is optionally provided and has a joint mechanism movably connecting the nail to the distal most one of the phalanges between a stowed position in which a grasping tip of the nail is concealed in the distal most one of the phalanges, and a deployed configuration in which the grasping tip projects out of the distal most one of the phalanges.