The N-Abler Prosthetic Hand-Tool System consists of a Preston terminal device and a Hayden tool set. The terminal device, which screws into the end of a prosthetic arm, has a socket into which over 100 different Hayden tools can fit, including hammers, wrenches, saws, files, locking pliers, even kitchen utensils. A button-operated mechanism allows quick and convenient tool insertion and removal from the terminal device, which can also rotate 360 degrees and bend from 0 to 45 degrees to provide the optimum angle for holding each tool.