Which statement is true regarding the shape of torque screws?

The statement regarding the shape of torque screws being true is that they feature a square indentation. Torque screws are specifically designed to accommodate a square drive which allows them to be fastened with a ratchet or a torque wrench, making it easier to apply a precise amount of torque. This square design is integral to their function, as it provides a secure grip for tools that are meant to adjust fasteners to specific tightness, which is important in automotive and mechanical applications.

The other shapes mentioned do not apply to torque screws. Flat-head screws typically have a simple straight slot for a screwdriver, while hexagonal designs refer to screws that can be turned with a hex wrench. Some screws may be designed for quick release, but this is not a defining feature of torque screws. The square indentation specifically ensures enough surface area for torque application, making it the correct answer.