Japanese Patent No. 3188507 describes an example of a conventional electric power tool. The electric power tool includes a power supply having a primary battery or a recharge
able battery, a motor driven by the power supply, a speed reduction mechanism for reducing the rotational speed of the motor, and a speed reduction mechanism for reducing the rotational speed of the motor. The electric power tool further includes a speed reduction mechanism for reducing the rotational speed of the motor, a speed reduction mechanism for reducing the