What is used to provide the best coverage for portable, power-driven tools?

Guards are specifically designed to provide safety features for portable, power-driven tools by protecting the user from potential hazards such as moving parts and flying debris. These safety devices are essential in ensuring that the tools can be used safely without exposing the user to unnecessary risks.

Using guards effectively enhances the overall safety of the work environment, as they can prevent accidental contact with blades or machinery, reducing the likelihood of injuries. They are often integrated into the design of the tools themselves and are crucial for compliance with safety regulations.

While covers, cases, and boxes may offer protection during storage and transportation, they do not provide the same level of operational safety that guards do when the tools are in use. Each of those alternatives serves a different purpose—primarily related to protection from environmental factors rather than direct operational safety. Therefore, guards are the best choice for ensuring comprehensive safety while using power-driven tools.