Hex screwdrivers are primarily used for what purpose?

Hex screwdrivers are specifically designed to work with hexagonal screws, which have a six-sided shape. This tool matches the geometry of the screws, allowing for effective torque application when tightening or loosening them. The design of the hex screwdriver enables better grip and minimizes the chance of stripping the screw, ensuring a more secure and efficient assembly or disassembly process.

In contrast, flat screws require different types of screwdrivers, such as flathead screwdrivers, and tools designed for cutting and bending wires would not typically be screwdrivers. Similarly, while holding objects during repairs can be important, it is not the primary function of a hex screwdriver. Thus, option B is the correct choice, as it emphasizes the specific application for which hex screwdrivers are intended.