A hand tool, especially a pruning tool, for use by persons who are unable to grip a tool or actuate a trigger mechanism but who retain the use of an arm includes a forearm-guided longitudinally extending sleeve and means to secure this sleeve to the user's forearm. The sleeve carries a hand grip positioned forwardly of the sleeve so the user can position his arm along the sleeve while grasping the grip as best he can. The grip or the sleeve carries a tool structure, such as a pruning tool, which extends forwardly of the grip, and an electrically operated motor connected is used to operate the tool when an electrical connection is made. Means are provided for supplying electricity to the motor, this electric supply means including a mercury switch which is positioned to be tilted when the user tilts his forearm, this switch connecting the supply of electricity to the motor whenever the user's arm is raised or lowered into a desired position in which the wrist is positioned either above or below the elbow when it is desired to operate the tool. The switch also serves to disconnect the electric supply whenever the user' s arm is not in the desired position.
