The Handyman is a series of convenient mechanical and small-scale chemical engineering tools that are stored within a prosthetic hand. Employing the Handyman for use involves the loss of the use of a hand and part of that hand's arm, and deploying or stowing the Handyman takes an action due to the micro-assembly involved.
By design, the Handyman cannot be partially employed. If one wished to use the torch or screwdriving components independently, it is impossible to simply extrude them from a finger - the entire hand must be disassembled.