What is the main purpose of a socket wrench?

The main purpose of a socket wrench is to fit over a nut or bolt. This specialized tool is designed to provide a firm grip around fasteners, allowing for the application of torque when turning them. Socket wrenches are typically utilized in mechanical and construction tasks, where they help in loosening or tightening nuts and bolts efficiently. By fitting snugly over these fasteners, they enhance the user’s ability to apply force in a controlled manner, reducing the likelihood of slippage and damage to the fastener heads.

Other tools mentioned, such as those that compress materials, grip screws tightly, or cut through drywall, serve different functions and are not suitable for the specific task that a socket wrench is meant for. A socket wrench specifically excels in working with nuts and bolts, making option B the best choice in this context.