Which tool is primarily used for close shaving?

The straight razor is specifically designed for close shaving due to its sharp, flat blade that allows for a very close and precise cut. This type of razor has been used for centuries and is favored by barbers for its ability to provide a smooth finish on the skin. The skill involved in using a straight razor also allows barbers to shape and contour facial hair with great detail, which is especially beneficial for achieving a clean, close shave.

In contrast, other tools such as the safety razor, electric shaver, and clipper serve different purposes. A safety razor offers a degree of protection from cuts while still providing a close shave but may not achieve the same closeness as a straight razor. Electric shavers are convenient for quick grooming and generally do not provide as close a shave as a straight razor. Clippers are primarily used for cutting and shaping hair rather than for shaving, making them unsuitable for this particular task.