Which tool is commonly used for detail work in facial hair styling?

The tool that is commonly used for detail work in facial hair styling is the trimmer. Trimmers are specifically designed to provide precision when shaping facial hair, such as beards and mustaches. Their smaller cutting blades allow for greater control and accuracy, making them ideal for creating clean lines and detailed designs in various facial hair styles.

While scissors can be used for trimming and cutting hair, they do not offer the same level of detail as a trimmer. Combs are essential tools for styling, but they do not cut hair on their own. Clippers are effective for longer hair cuts and bulk removal but are not suitable for the fine detail work necessary in facial hair styling. Thus, the trimmer stands out as the best option for this specific task.