What feature should a power tool have to minimize electrical hazards?

A power tool equipped with a ground fault circuit interrupter (GFCI) is designed to minimize electrical hazards effectively. The GFCI functions by monitoring the electrical current flowing through the tool and interrupting the power supply if it detects any imbalance, which can occur if electricity is leaking to the ground. This is particularly important in environments where tools may be used around water or in damp conditions, as the risk of electric shock increases significantly in such settings. By disconnecting the tool from the power source quickly, the GFCI provides essential protection against severe electrical shocks that could lead to injury or fatality.

Other features like overload protection are useful for preventing damage to the tool itself or for enhancing its operational efficiency, but they do not directly address the critical need for protecting users from electrical shock. Similarly, speed control and oscillation settings contribute to the tool's functionality and precision but do not provide any inherent protection from electrical hazards. Therefore, the GFCI is the most pertinent feature for minimizing risk in this regard.