A prosthetic arm and detachable hand with wrist and mechanisms that allow the joints to be manually rotated and locked into place. The hand has a wide, hinged, non-jointed thumb with a large surface and a curved pointer finger with no joint. Fishing line runs through the middle, ring, and pinky finger's joints connecting the wooden pieces that correspond to the phalanges of the hand. Braided nylon cords are attached to the prosthetic socket.

The prosthetic was built by Morris A. Robbins, M.D. (1916-2004), an orthopedic surgeon who practiced medicine in New Jersey for more than half a century. Robbins suffered an accident as a teenager, an event that resulted in the amputation of his left hand and permanent limitations for his right hand.