Which of the following is considered a non-porous tool in nail care?

Metal tools are considered non-porous in nail care because they are made from materials like stainless steel that do not absorb liquids or harbor bacteria. This characteristic makes metal tools easier to sanitize and disinfect compared to porous materials. Non-porous tools can be adequately cleaned and sterilized, ensuring they maintain hygiene standards essential for nail care practices.

In contrast, wooden sticks, fabric files, and paper towels are examples of porous materials. Wooden sticks can absorb moisture and bacteria, making them less suitable for sanitization. Fabric files can also trap debris and bacteria in their fibers, while paper towels are designed for single-use and cannot be effectively disinfected. This emphasizes the importance of using non-porous tools in nail care to promote cleanliness and prevent the spread of infections.