A powered surgical tool, the powered surgical tool including: a tool body (32, 52); an energy applicator that extends forward from the tool body, the energy applicator adapted to receive energy from a power generating unit and apply the energy to tissue to which the energy applicator is applied; and a switch assembly attached to the tool body (32,52) for controlling the actuation of the power generating unit, the switch assembly including a switch that is moveably mounted to the tool body and a sensor configured to generate a signal representative of the position of the switch relative to the sensor, characterized in that, the switch assembly further includes: arms (132, 158) that are moveably mounted to the switch such that the arms extend outwardly from opposed sides of the switch and each arm is capable of moving from a safety state to a run state; a member (146, 168) attached to at least one of said arms such that when said arm is in the safety state, the member engages a fixed surface to prevent movement of the switch and, when the arm is in the run state, is spaced from the fixed surface so that said member does not impede switch movement; and at least one connecting component (140, 162) that extends between said arms (132, 158) so as to cause simultaneous movement of said arms such that when either arm is manually moved from the run state to the safety state, the other arm is moved from the run state to the safety state and, when either arm is manually moved from the safety state to the run state, the other arm is moved from the safety state to the run state and so that, when said arms are moved to the run state or the safety state, both said arms remain in that state until said arms are manually moved to the other one of the safety state or the run state. a tool body (32, 52); an energy applicator that extends forward from the tool body, the energy applicator adapted to receive energy from a power generating unit and apply the energy to tissue to which the energy applicator is applied; and a switch assembly attached to the tool body (32,52) for controlling the actuation of the power generating unit, the switch assembly including a switch that is moveably mounted to the tool body and a sensor configured to generate a signal representative of the position of the switch relative to the sensor, characterized in that, the switch assembly further includes: arms (132, 158) that are moveably mounted to the switch such that the arms extend outwardly from opposed sides of the switch and each arm is capable of moving from a safety state to a run state; a member (146, 168) attached to at least one of said arms such that when said arm is in the safety state, the member engages a fixed surface to prevent movement of the switch and, when the arm is in the run state, is spaced from the fixed surface so that said member does not impede switch movement; and at least one connecting component (140, 162) that extends between said arms (132, 158) so as to cause simultaneous movement of said arms such that when either arm is manually moved from the run state to the safety state, the other arm is moved from the run state to the safety state and, when either arm is manually moved from the safety state to the run state, the other arm is moved from the safety state to the run state and so that, when said arms are moved to the run state or the safety state, both said arms remain in that state until said arms are manually moved to the other one of the safety state or the run state. arms (132, 158) that are moveably mounted to the switch such that the arms extend outwardly from opposed sides of the switch and each arm is capable of moving from a safety state to a run state; a member (146, 168) attached to at least one of said arms such that when said arm is in the safety state, the member engages a fixed surface to prevent movement of the switch and, when the arm is in the run state, is spaced from the fixed surface so that said member does not impede switch movement; and at least one connecting component (140, 162) that extends between said arms (132, 158) so as to cause simultaneous movement of said arms such that when either arm is manually moved from the run state to the safety state, the other arm is moved from the run state to the safety state and, when either arm is manually moved from the safety state to the run state, the other arm is moved from the safety state to the run state and so that, when said arms are moved to the run state or the safety state, both said arms remain in that state until said arms are manually moved to the other one of the safety state or the run state.