True or False: It's important to visually check the sander's disc or belt before use.

Visually checking the sander's disc or belt before use is crucial for ensuring safety and efficiency during sanding operations. Inspecting these components allows a mechanic to identify issues such as excessive wear, damage, or foreign objects that could compromise the quality of work or lead to accidents. A worn or damaged disc or belt can cause improper sanding, which ultimately affects the final product and can lead to injuries if the equipment malfunctions during operation. Therefore, this preventive measure is a fundamental practice in maintaining both the integrity of the tools and the safety of the mechanic.