Which of the following are types of mandrels?

Mandrels are tools used in various manufacturing and crafting processes to support, shape, or hold another workpiece. The correct answer identifies types of mandrels related to specific applications. Wire brushes, swabs, and cutters are indeed types of mandrels utilized in equipment for cleaning, polishing, or processing materials.

The other choices consist of terms that refer to components generally used in fluid systems or connections, but they do not fall under the category of mandrels. For example, filters and nozzles pertain to fluid delivery and management, adaptable components, or tubing serve different functions in mechanical and plumbing systems. Therefore, the characteristics of the items listed in the correct answer align with the function of mandrels, making it the right choice.