Razor blades are thin, flat pieces of metal designed for shaving or cutting hair. They are typically made from stainless steel to prevent rust and are often coated for a smoother glide. Razor blades can be used in various types of razors, including disposable razors and safety razors, providing a close shave for personal grooming. The sharp edge of a razor blade allows for precise cutting, making it effective for tasks beyond shaving, such as crafting or trimming. Proper handling and disposal of razor blades are important for safety, as they can cause cuts or injuries if not managed carefully.